Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2847509c23723a…

MALICIOUS

PDF

82.2 KB Created: 2021-05-11 03:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b1a4924d44a1a20cb2be32ea8e876251 SHA-1: 1503d831e7519a936b9640bd0c7df241bb3e9f49 SHA-256: de2847509c23723acd0cf4f99edb3be498ca5248beaf8298c4e376e51e439c64
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 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+open+your+own+beauty+line PDF link annotation
    • https://cdn.sqhk.co/vanewano/f3idgjd/wordscapes_level_8056.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/lPaBaed/shell_alvania_rl2_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/wqghKTU/57092431539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_6029f290cc4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_601d4c4bc9fc5.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/d4b12c3f.pdfIn PDF document text
    • http://storeplus.pro/jedapenudaxurafitavaxeqv0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_60497cb12a251.pdfIn PDF document text
    • http://copyright-rules-help.com/14005976975um0m6.pdfIn PDF document text
    • http://winoorama.fun/52469016659m1r3a.pdfIn PDF document text
    • https://zozajiditufex.weebly.com/uploads/1/3/5/3/135309939/eb148b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_601a3a2415c12.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/gazada-jolus-mobawoni.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/eeiPEtv/42245352125.pdfIn PDF document text
    • http://ru-payment.casa/70100673557ne2rk.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/fiChhSH/zamodovixavixitidu.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/1c2adc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_9bb7d177f668433e974a7be528c11035.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_5d26109826b84f999b3d2a7148ff0989.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_015c467e6de24781941d4c02db22ca26.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 4928 bytes
SHA-256: 2e502781d647d2dffa940e8d049acaca68445d672269bb3f19775b9f2ce77ac9
font_01_sfnt_off00011565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 11304 bytes
SHA-256: 84604071192d965c551f19d07a21ac9857a106e2eb0a06d24bd8812f5908f9cc

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