Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6a0ab13a4bfdba…

MALICIOUS

PDF

89.0 KB Created: 2021-09-16 03:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ccc60298d13d73628f8a5f00666be182 SHA-1: 5b54718184f52a64df70feec221f4e6f41a95b0a SHA-256: 2e6a0ab13a4bfdbad20c76ca073a623f3f254b01fe5e05ad08269d71a1e54586
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=line+charts+are+very+effective+at+showing PDF link annotation
    • http://timebymtm.com/upload/files/13630260387.pdfIn PDF document text
    • http://1carl.com/userfiles/file/remebowaru.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/34516602929.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/33417322167.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/guvulufef.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/niteratonukotig.pdfIn PDF document text
    • https://bursac.net/userfiles/file/17435891810.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/zikuwifurejiwejanapevi.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/pobeduxug.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/167162303.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409827a7d0b---teguzibipevuzunazof.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/figuwezevosivuzuf.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/37835267807.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/katot.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/jimixikoxusofurar.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/radusuwodegakiwekex.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/14323620443.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/tixudimojo.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/98290451706.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/55743589960.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/zelebibugasonitir.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/rufajanilomomipe.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/menawaribozopigivupewokom.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/gezuwodibogigaxapi.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109070209211201.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_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 18260 bytes
SHA-256: b8d833bebb68f9b9a081a518d9d3770f2fd9f3a83818194ddf25171ab0d7150c
font_01_sfnt_off000124cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CB 10792 bytes
SHA-256: 0f52c6286fc2856bf24543aa3074a3f3a873161b901ead1947becd38c4cd492b
font_02_sfnt_off00013dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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