Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc3f46cbf305f39…

MALICIOUS

PDF

69.8 KB Created: 2021-02-22 01:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5d65b271f3a2c048f27c8292f8848184 SHA-1: d981056dd45898d526f5899ea6935a69d0974f53 SHA-256: 7fc3f46cbf305f3910e421b42e7633de0e14a76bc47cd96deea9eac6c349f1a8
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 by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful websites.

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://druttle.ru/wix?keyword=i%2527m+forgiven+because+you+were+forsaken+hillsong PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5fcbc722328d2.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/Be6ggjj/runescape_shark_fragments.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_60320e91a91b8.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/kesepazowobunanuza.pdfIn PDF document text
    • http://help-violation.com/how_to_restart_verizon_router_g3100f2ox1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_60102dcd93697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd254e200402.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/aFAQ6gc/captions_for_instagram_pictures_2020.pdfIn PDF document text
    • https://rufeguduti.weebly.com/uploads/1/3/1/3/131384240/naserupifuf-soxugagov.pdfIn PDF document text
    • https://xoxovumalojiru.weebly.com/uploads/1/3/0/8/130874224/e4f176.pdfIn PDF document text
    • http://civiliscmq.online/margaret_peterson_haddix_series_in_orderp1laf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384825/normal_5ffe6fb1e3af5.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hjjgpSJ/dusuxalobe.pdfIn PDF document text
    • http://hookup157.site/canadian_passport_application_form_for_babyazs9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_6015a591ba21a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_5fdc2a5fcdcbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465010/normal_60138da2ae5ab.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/fimodojup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_601d067b4bca8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD459 5724 bytes
SHA-256: 3b9e500177c13266bbf49600d46c28a17207585184bfc95d5b36fda912c8b321
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 9892 bytes
SHA-256: d6ed509fa5b92f536b3e3e27a19b07f8a53f78ae2ee244c5456ea8434ce55b90

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