Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37a332a5f1a4ef4…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 23:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7e2620e23b014f557d9adf5e8802ed57 SHA-1: 202206a3b1232c4cee2a6c0a7d2f9883172b0dec SHA-256: d37a332a5f1a4ef488e9b2fb570e86a4743aaeda11b6e5bb7ed5e461d1d84294
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a 'download button' heuristic further supports the lure-based nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/zosepifolezugemixenofoga.pdf In PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/78531640121.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/kurubedonakadokijatuve.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/wenetujekufuzamibojebe.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/zosovoruw.pdfIn macro / runtime command snippet
    • http://deltastal.ru/userfiles/file/51856603878.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fe955c47c---19846402733.pdfPDF link annotation
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ca9f637bfd5d0384e808420f71534aa0/jebavapokotipanotadojow.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/pupikamutupoguwozid.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/nasetesefamudisixalegose.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d91bcaa7204---bomatasidorufapavex.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/82871981536.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/384611102.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/778d2169af9d64fd8a049b17e0f3bd73/rodulez.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c0195e59f22d9769d18636ca30ea0c19/46052392570.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///tulatosanumunijitupelu.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/sqija5lb3fl1tp689atfajjv8e/93176994194.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/4437618401.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa4fdaa72---pujirezajidigikanepan.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/jadowikapo.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/38504880602.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/doxasatunisojoxiroki.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/50741169845.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078d7d7ceea3---71723176411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=dream+league+soccer+2016+additional+contentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FE 11276 bytes
SHA-256: 200e426ce0ff57e01df3504d9347068bd8f6c74fc6479d28636273120f43000b
font_01_sfnt_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001176b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 18064 bytes
SHA-256: d87fb1d95b4975da80614b2ce5db924d1ec8dcd185c16ba5275dc8521ed32b36

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