Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97103592a105661…

MALICIOUS

PDF

70.6 KB Created: 2020-12-01 02:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b0956ae88ebc7ad20b01677bfbfd050d SHA-1: dcca6e8f4beef8d9d329df0eed5021c79b462002 SHA-256: a97103592a105661bfa0ebe0ae73f3f9d9f215f5661d27b042077b33767f8a27
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 0.9997

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://traffset.ru/strik?utm_term=aashto+green+book+design+vehicles PDF link annotation
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/7909875.pdfIn PDF document text
    • https://numobokofe.weebly.com/uploads/1/3/4/5/134501802/4722139.pdfIn PDF document text
    • https://woxujinugav.weebly.com/uploads/1/3/4/3/134305359/pomuropefamoxegudez.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/7112889.pdfIn PDF document text
    • https://tekadepaja.weebly.com/uploads/1/3/4/3/134341299/637b965cbd.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/pijunez.pdfIn PDF document text
    • https://fawawivog.weebly.com/uploads/1/3/4/5/134595284/0b4e34002a7.pdfIn PDF document text
    • https://kigixefowu.weebly.com/uploads/1/3/4/4/134496532/9679253.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://uploads.strikinglycdn.com/files/33fad42a-4db3-4a95-a998-fc70dad04059/96917921334.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/53294518408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f34533-7a9e-47a8-93a0-372388ccbb65/46206186026.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/spotify_cracked_version_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 5240 bytes
SHA-256: 02c6f883f8bbb2e88cc1a74254b46f6fda51bf6e4dddc294d43b0405657fc7f0
font_01_sfnt_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 10432 bytes
SHA-256: cb6f7cdff8da31759538f7dd2f69e50c7eea421407493e110bb1f4751a9ffc33
font_02_sfnt_off0000fef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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