Malicious PDF — malware analysis report

Static analysis result for SHA-256 008a407b4fcc0521…

MALICIOUS

PDF

80.0 KB Created: 2021-06-02 10:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 034e12971bf34369f12e5a454c55b581 SHA-1: 1588785a382e5b07cbb02ab749aa171517324508 SHA-256: 008a407b4fcc0521ba310cf8c5e24a5050151514db8f0c0c2d68894be8cdd251
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 0.9998

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://bologen.ru/123?utm_term=bba+aviation+annual+report+2017 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fe5d23829c87.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/revamiketurileti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_602532e1b2a1a.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/rinezirikirowuzud.pdfIn PDF document text
    • https://dawujorukola.weebly.com/uploads/1/3/4/6/134683436/513160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fdfdbbdca441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_601a643f19c2e.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/1423582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_6040bc1fbfb3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5fc82e46a0f7d.pdfIn PDF document text
    • https://gebiralegesexi.weebly.com/uploads/1/3/0/8/130814020/luwitif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_60564488114ef.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/dezek.pdfIn PDF document text
    • https://kozizekovina.weebly.com/uploads/1/3/4/8/134891358/viduz_tuwonapo_xumekawov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_6064eca228dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_60524ebc461d9.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
    • 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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 5172 bytes
SHA-256: 214449041a9df218c43f9f67eb84819a762a2b02f45cd3e5ddee9defa3b1c259
font_01_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 10764 bytes
SHA-256: bc045f8a031d383403ac34b14a7f0f6f9cb88e4811ffbedfffc45f29aa18e76a
font_02_sfnt_off000124ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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