Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba6368f380805db…

MALICIOUS

PDF

75.6 KB Created: 2021-01-11 23:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5a06392bdb0b6854c49f5fa4b1426c04 SHA-1: 22618866b38753693fb43f957e72d350c4475d82 SHA-256: 2ba6368f380805db087e125afb1cdb3e1acd6a7d2a855105c9bafe764a715886
186 Risk Score

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-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://traffset.ru/aws?utm_term=anemia+falciforme+causas+y+consecuencias PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/gawowubi.pdfIn PDF document text
    • https://mebitulipavore.weebly.com/uploads/1/3/4/3/134339985/dubukorol_fijepixam.pdfIn PDF document text
    • https://jujopikin.weebly.com/uploads/1/3/4/2/134265816/1047265.pdfIn PDF document text
    • https://terobatef.weebly.com/uploads/1/3/4/3/134397950/2553749.pdfIn PDF document text
    • https://majemuxisirilud.weebly.com/uploads/1/3/4/7/134719568/pugukanolekewaso.pdfIn PDF document text
    • https://cdn.sqhk.co/muxaferamet/v0hbikp/20092816042.pdfIn PDF document text
    • https://lizitizesibegip.weebly.com/uploads/1/3/4/6/134685526/konoguzuwivefon.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/tugumeb/total_utility_is_best_defined_as_the.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/82881184993.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/american_pie_7_movie_free.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_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 5120 bytes
SHA-256: 71c6fd3545ce344abc8a8ac1c1b9dcaac8644f4d15c686e02eb56da55dad8416
font_01_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 11108 bytes
SHA-256: 81ee7be4665cd590f1a5cca44ae9694023b53363928fba87e11ac466198af95f

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