Malicious PDF — malware analysis report

Static analysis result for SHA-256 d078eccec6e4e3a2…

MALICIOUS

PDF

84.7 KB Created: 2021-04-04 05:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eba3976cdc1d4e3de05ba79d433e897f SHA-1: 232b3618922bc8fffacdc1f4ac56aabae35d436b SHA-256: d078eccec6e4e3a2c15b79c7c8a50d3eabc078f9d84b6a35ab6d852a11756d5a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=acidose+m%25C3%25A9tabolique+et+respiratoire+pdf PDF link annotation
    • https://cdn.sqhk.co/novitovikor/8dHtjaV/bwv_1068_guitar.pdfIn PDF document text
    • https://gelowoxolup.weebly.com/uploads/1/3/4/7/134703814/wujofomepox_mudoxajafidofas_dukatibu.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/pedon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_5fe69299a0039.pdfIn PDF document text
    • https://luzozesojuximu.weebly.com/uploads/1/3/5/3/135321468/5827194.pdfIn PDF document text
    • https://dovenegipejapu.weebly.com/uploads/1/3/0/7/130740438/mojuwogapuvuv.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/nuduvopo-romavokunido-rivegexi.pdfIn PDF document text
    • https://vixamimi.weebly.com/uploads/1/3/4/6/134684805/tatevilejafumurut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_602f1b87731eb.pdfIn PDF document text
    • https://roginolesalit.weebly.com/uploads/1/3/1/6/131636974/nitutufixuke_kojepafa_sufapetatijopa_wuruvipu.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/2503780.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/gep1IxP/there_you_go_pink_live.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/sotetuxuwikopob.pdfIn PDF document text
    • https://tibuvaji.weebly.com/uploads/1/3/4/7/134720571/zoxin.pdfIn PDF document text
    • https://pewofofuvalok.weebly.com/uploads/1/3/0/7/130775386/8836e745cbbb94f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuvidokibet/why_do_you_want_to_work_in_healthcare_interview_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/vedevuvopivegojifazex.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 5476 bytes
SHA-256: 80bfc654f1d8e162aaf45350df787b989d563c93bf183bde3f13ffe482f7410c
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 13816 bytes
SHA-256: 6323ebd82a13a64d5bb8aa5e3d49df291990f520962fc9e3d44289fb27a86267
font_02_sfnt_off0001355a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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