Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c442b4215b7348…

MALICIOUS

PDF

76.0 KB Created: 2021-03-16 16:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9179b632f8574060ab31da77fe2d2b31 SHA-1: dd1352baf39ca0072234f077fe32886cf46540b8 SHA-256: 71c442b4215b7348f04093d58ad52b62144ac788eba5cd5279b2ad8455f02342
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 0.9998

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://jumiwimov.ru/wix?keyword=link%2527s+awakening+bananas PDF link annotation
    • http://iranomics.com/654217427640nk2e.pdfIn PDF document text
    • http://gratoraama.website/bonurugubetatogblx9.pdfIn PDF document text
    • http://molotkov.site/detukifojasujogemeditaralqbsfv.pdfIn PDF document text
    • http://plsale.pro/rs3_corrupted_creatures_slayer_guidelvcll.pdfIn PDF document text
    • http://boevoenlp.com/xejevuvokelord4cdp.pdfIn PDF document text
    • http://shoppingyxplus.xyz/sonic_route_44_sweet_tea_nutrition8ssn7.pdfIn PDF document text
    • http://changely.club/bartok_mikrokosmos_vol_1_imslpwpma4.pdfIn PDF document text
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/7ad6afbb.pdfIn PDF document text
    • http://studyweb.site/27780688922hfczz.pdfIn PDF document text
    • http://alania365.ru/15652284496laz78.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/ea59edeadcb2e.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/fukepez/63998184711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1db24b3-44e1-4bce-b665-4c1d343c4267/worx_electric_chainsaw_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c2f6cf-a187-4b30-ad71-fe5bc6263c42/10805037765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db321a14-43e7-4c10-ab60-ab7880461d8a/53264072388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e938887-44b7-4afe-ab1b-d2566eb47aba/80772760342.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/41750587407.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 4996 bytes
SHA-256: 49e4340a9bcdfe6b6d8c751fdb874fb2c71fabf97fb0a2bbf559211ba3f5355a
font_01_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 10628 bytes
SHA-256: eb60fdead6dce4133dff426717a5ae9786fdb01ad1b6ee0a765b206b11880c41

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