Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0ff4d5d23449d6…

MALICIOUS

PDF

95.8 KB Created: 2021-08-10 22:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bbe8f76d87013cb9ebaec61818d6ef19 SHA-1: a4ad71edd4997eba610e4e1194beefd22fbb49ad SHA-256: ea0ff4d5d23449d64f33c58a64d19afad1988cfd0f90e1ddf9b371a205c4c482
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised websites, likely serving as a lure for users to download a secondary payload. The presence of PDF-specific heuristics related to URI and link farms further supports this attack pattern. No scripts were extracted, limiting the ability to determine specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3820220ee2a00f3e732eb3dcbcf3f510/89566931902.pdf In PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf03996e77a---36818520631.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/45081107427.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160704d6a0acf6---pemonad.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/20368524075.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/23070212097.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/57976707103.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/76060486961.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210630_546CD576C8FFA734.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160930690dcd45---28314869571.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/46694044310.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/51649945548.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/fikapa.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c409bda0c02b6260175f2ea5272fa89d/zazusorowivagirizesik.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/852b7b4a5f9b290ff7f9f87c86b72f6e/34033808199.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202107311916097944.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zatoderokuvubirunoxikap.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/dezupapegofime.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/zaruvopewekirupirupa.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c647eca3---numifuj.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9afc00f7df---88776490567.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/p8sthpevn38rhd902662iusc61/jiwepogumemakilomik.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f62f3fadd---vujenet.pdfIn PDF document text
    • http://teplospectr.ru/images/files/zitew.pdfIn PDF document text
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/zerowaboxirigedaf.pdfIn PDF document text
    • https://chp-travel.ir/data/file/97443216392.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/mabosirixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=activation+key+cubase+8PDF 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_off000112c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C3 17140 bytes
SHA-256: 2200109e4c233df1cadae7c199e341748310ee6ce18ab67802007fe9bf590aba
font_01_sfnt_off00013fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB7 10776 bytes
SHA-256: 27d91f4e224b3fd27a2ccba547d1ced489bc37754d81893a81f489dde378544b
font_02_sfnt_off000158d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.