Malicious PDF — malware analysis report

Static analysis result for SHA-256 36adef7afba06215…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 18:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 275e88054cde471ac4a5cda7dc41adc9 SHA-1: 9b1b76eaf6ae40dbe82555328e937cc1591480dd SHA-256: 36adef7afba06215436724ce0677b5bb4118e31fd162e45d4a2ec43b9829c407
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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=revitol+stretch+mark+cream+ingredients PDF link annotation
    • https://cdn.sqhk.co/filemowa/fNIjbha/vixurijezijejifexeritulav.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/egjhjic/zilumexozapide.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/eheZDNm/cool_school_ms_booksy_stories.pdfIn PDF document text
    • http://uaregroup.com/chained_movie_2012_freeh4cxn.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/9gichj1/ratutevojinokefasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_6045d5a9b5113.pdfIn PDF document text
    • https://cdn.sqhk.co/busunava/jhihigE/kilokarev.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/the_tell_tale_heart_by_edgar_allan_pr163d.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/AaYrhgi/2020_moto_guzzi_v7_iii_racer_limited_edition.pdfIn PDF document text
    • http://esclub.info/wizard_spellcasting_tabletitui.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_60460fc03ccf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5ffe82f77f8cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_603184143d031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389809/normal_5ffe511cc2cba.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/hj60pjj/mabilujodawawokevares.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/ashes_of_oahu_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/84831184424.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/documentum_administrator_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/sinatebopofofimas.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_54e6a03929fd423c9c81ffffe6b50a28.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_9c1d0d6889e64569876ad3f170d4b53f.pdf?index=trueIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_c9380c1133d342d6b802a397f0b39034.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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 5484 bytes
SHA-256: 5df79b9a61d2649a5c441fb665fcdc6d4de73fde099b08e87d7906c839906bca
font_01_sfnt_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 10572 bytes
SHA-256: d7726f1da3da6d54b64697142cb7c446834730375b5ae985ca6617e11e3bb8fa

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