Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf167a4f1cebae2…

MALICIOUS

PDF

77.7 KB Created: 2021-01-16 03:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d658deb0af99fbceaedcf8bf76eab9a8 SHA-1: 8cc8411121338e1f29debab47c39fc994b956fee SHA-256: bbf167a4f1cebae23da6b3ee320c1e797824976438de37d9481397257f28b140
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The document body's mention of '1880 silver dollar value chart' serves as a lure to encourage clicks on these links. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://trafffi.ru/123?utm_term=1880+silver+dollar+value+chart PDF link annotation
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/batexagapibag_kelekewowuw_xabibizerama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451971/normal_5ff31b7417cf5.pdfIn PDF document text
    • https://damelexivukek.weebly.com/uploads/1/3/4/7/134771288/zezexut_kutafosifike_fopegotitib_wafoxopizikil.pdfIn PDF document text
    • https://kopuzivepepojom.weebly.com/uploads/1/3/4/3/134330145/3665106.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/a081f94c8d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fa779edc8ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5f9f7cddea46c.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/niraso_fawativurobit.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/8777150.pdfIn PDF document text
    • https://site-1176447.mozfiles.com/files/1176447/verb_exercises_with_answers_for_class_4.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://s3.amazonaws.com/palevijuj/astro_file_manager_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/ielts_9_listening_test_3_answers.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 5156 bytes
SHA-256: 3cf89586d4602a0d14d7c315886d72299af28e650aca9e8ae1d82d9c9190215e
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 10840 bytes
SHA-256: 0ce9c759a9cdd72725a22c3977c9eab8b88705dcbe52ded3cc1faed5cbfe84da
font_02_sfnt_off00011bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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