Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e1b63ab6334743…

MALICIOUS

PDF

71.1 KB Created: 2021-05-10 07:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ee0d3798de9514cf0e6c63a3d532b6e SHA-1: 1254e0041f893d8de63c31aa12fb5f8bb578438d SHA-256: 80e1b63ab6334743b14f18916e47e3b1c4b48ea2a2b52be5121789948f60ea9a
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 0.9996

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://jottigo.ru/strik?utm_term=traktor+s4+mk3+manual PDF link annotation
    • https://zuripiri.weebly.com/uploads/1/3/1/8/131856797/ginadevelopuga_rirobawub_zudenevutadumo_fuleb.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/supavogixupagigo.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/5488823.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/80357420075.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/aeddce124fb4.pdfIn PDF document text
    • http://towufugejudet.iblogger.org/greater_trochanteric_bursitis_stretches.pdfIn PDF document text
    • https://lopifonexebifi.weebly.com/uploads/1/3/5/9/135986218/pejinutixoloko.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/xirugeriromo-genibob-nadomotodexuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca821bb2-95ee-47f8-8935-b15bf9459504/82768402785.pdfIn PDF document text
    • https://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_15cb8198cd0649d89db54f5acddaabb0.pdf?index=trueIn PDF document text
    • http://zoxexikagu.rf.gd/227_bodyweight_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2b4c66-98b2-42dd-a96e-77589d7ab573/jizizulenegugowiduka.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_1de3cfb0a85c4730b262dce7a16266af.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_fec802c309414dcd917dfe4913e4a8da.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_a0f5069d20d6464c946870f885af8b00.pdf?index=trueIn PDF document text
    • http://kizebemifovexe.rf.gd/pojalabakobamudukidizalur.pdfIn PDF document text
    • http://zozasozam.epizy.com/29196924616.pdfIn PDF document text
    • http://girupesoja.rf.gd/rafebireximoxaxivaxagux.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_e71d3fcb815b4363ab7ca1eea5cfe065.pdf?index=trueIn PDF document text
    • http://memamawu.onlinewebshop.net/sinhala_baby_boy_names_with_meaning.pdfIn PDF document text
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_b9183bd04b934a659e747a5554e28fce.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_5e61940e040447b4bc61e85c240784d6.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 5096 bytes
SHA-256: eca0e744c31cb0aeb9b9af09616e15958e9229be147d344a821d607ee0379d32
font_01_sfnt_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 10892 bytes
SHA-256: 2ca07a4e06201d9188c3aabde72e636b0a4f5863c9d84ff1647dbb9fffcc1f76