Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d832203436915dd…

MALICIOUS

PDF

87.3 KB Created: 2021-07-03 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1fd42a108ba4a69d5e6b5540f40b6f0d SHA-1: edf4d3e7cb0f0eb45b651a61f46a4c0ce224b9a1 SHA-256: 0d832203436915dda655c386d66da24849c0e995910445aed5e8e19327263686
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://mimpi1pusat.com/contents//files/wefutobor.pdf In PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/1326f9f6827bde0b8aaa981bd4dfa867/wofutekofilidugitanax.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/3sdk6jq5c9p5fia3tdupm9j1ps/rifirawi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/4e2f9640a303cd5f0b048ad0bbe7dca0/gomemamofaretotuvov.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/1732358427.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/e44e98506a5bf03ec580c44c7f645dca/juzixipale.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/sebenetokazofidomam.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/pidawepolevowoza.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/90664621298.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/70829354338.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/52393712457.pdfIn PDF document text
    • https://virker-ikke.dk/files/bupepavonijopi.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/duwewozikisi.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/vesonitedazaner.pdfIn PDF document text
    • https://unitjaya.com/contents//files/76047817934.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/84223fac8cbd2ab9762ad04941c317ce/49965477379.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16085453de897b---budesaw.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/rilajikigodavixarusika.pdfIn PDF document text
    • http://iwishop.hu/file/silufasidudujexa.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/374bbdad3f6d425acce9b0c95cb7615c/lanifuvatasupoturofuge.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087701f2ba13---84626139622.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/bagovuwibizota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=lord+of+the+rings+quotes+bilboPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/855ddf8307a388e883be34dcfbd6a25b/14429449195.pdfIn PDF document text
    • 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_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 16912 bytes
SHA-256: 3e6df5512ebcf7d828cb17baa967f63eabef934aa0e4fceb5a82a7b3e36c35f2
font_02_sfnt_off000137af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AF 10816 bytes
SHA-256: 17b489aff19aa36e566cf3a1ed787b954b75297e79bdbd1416b38ef70a8652af

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