Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc8f096fb317f7e…

MALICIOUS

PDF

79.5 KB Created: 2021-03-15 05:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f8a9495044d610f8b2cc565a65f6e48b SHA-1: 2c4228ab6533ebca8c5493fa9940096baa798ff4 SHA-256: 2fc8f096fb317f7e43c602d38a3e158c474bb28df7667d7cbea3321b7ad665e6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing operation. ClamAV and ML heuristics confirm maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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://baarspo.ru/strik?utm_term=after+book+series PDF link annotation
    • https://cdn.sqhk.co/bulidavikate/icxheUz/astera_ax10_manual.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/e3f6ed6e74.pdfIn PDF document text
    • http://dasazopemobor.mywebcommunity.org/paxezovogigiduluwinulamur.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/84444616969.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/36878d30.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/votof.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/vixovekezera-nexudiritofus.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/RxjhNig/38894130618.pdfIn PDF document text
    • https://xinawekasev.weebly.com/uploads/1/3/0/9/130969151/fetotofi.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/brother_hl_2280dw_manual.pdfIn PDF document text
    • https://varigero.weebly.com/uploads/1/3/4/4/134443598/xopejalo.pdfIn PDF document text
    • https://ramorebuba.weebly.com/uploads/1/3/4/8/134898890/f35c621ffa1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/45433757152.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_d87bc2079a5f44c5848ab220bfb526cf.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/lidapikifubabijeki.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_75519c20ca3a443e8df6a9c58fed7bc5.pdf?index=trueIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_ca3d127e1e784233abd53b57ddc1caed.pdf?index=trueIn 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_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 4712 bytes
SHA-256: 0b0a6d0e6b33396b53ed3829611c4e1e2c25d0511ea6d679bd3337c6e432b86b
font_02_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 12116 bytes
SHA-256: 7aceeada7a84754155e4b50444c08a99c38a4f9bd7673a068bf0c95fdb8ff838

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