Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa9218d4ee48512…

MALICIOUS

PDF

93.5 KB Created: 2021-03-07 05:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07a85e55d01c39e67e8eae919efcc03b SHA-1: 6115745644d9c4d0dd956d1ef5cf58164a54fa77 SHA-256: 9fa9218d4ee48512f515403a143a745c5340298a2d149784f6a6dee1c1bb7824
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

Heuristics 5

  • 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 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://baarspo.ru/aws?utm_term=is+darth+bane+mentioned+in+the+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419827/normal_601a9b51cdf37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fe8b7adbd0f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_5fccd5dcce4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602c1d5036d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6022bb7481e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_603506309c029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_603427c701076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd8ae9241db7.pdfIn PDF document text
    • http://lnstagram-office.com/boripadabetisofulewagovszjc1.pdfIn PDF document text
    • http://ccckkkkk.space/13597463984pp0gc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_602113dd6b5cc.pdfIn PDF document text
    • http://tradebot.space/mini_me_games_project04i5o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_60178646848ab.pdfIn PDF document text
    • http://noverst.xyz/41111274770e5duy.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/runuzitexokol/18260655099.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/lia_griffith_crepe_paper_peony_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/thinking_skills_worksheets_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/lopetirotapilelopenakibom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ce6352-907f-47bf-8982-4b081b4cf44c/motorola_talkabout_250_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab19482e-f20f-4fb8-809c-3a58e24c0234/what_are_the_command_prompts_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2e1ef4-2c16-4f3f-84b7-a4684ebe5e76/4597390953.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/70105008789.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
    • 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_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 5172 bytes
SHA-256: 27d42cf1cd8bb037f19503954b09fd3438c9b6cad03a3bebaa4965e86a74c15e
font_01_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 10832 bytes
SHA-256: eaed285b5fd3fef0aab06292d093161ef4f57a231493afcd80940ed775c511a8
font_02_sfnt_off0001499b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1499B 19436 bytes
SHA-256: 51528744759ec8d07299f43672ed84d6cabed238fc47b3189ad33d1ee3059b19

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