Malicious PDF — malware analysis report

Static analysis result for SHA-256 62df013c470b3616…

MALICIOUS

PDF

83.0 KB Created: 2021-05-25 07:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f22b3e66af8179801e0d104d403f49 SHA-1: d51a659742e50e896de06863b38f9ca1f468c8bd SHA-256: 62df013c470b361694abf602e1dac99fd1b8186e5c240b5c58ed02efb9160043
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link farm attack. It contains a large number of external links, many of which are hosted on Weebly and appear to be generated for SEO purposes, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=singer+sewing+machine+repair+near+me
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/8610848.pdf
    • https://nefotinabe.weebly.com/uploads/1/3/5/3/135314884/lubujeg_sosizatob_vonabe_lesokolobonek.pdf
    • https://bopizuvobaz.weebly.com/uploads/1/3/4/6/134668398/taladeb-bizojod-voxus.pdf
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd3404bc97b.pdf
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/6978000.pdf
    • https://lonupuvajofova.weebly.com/uploads/1/3/4/3/134341927/rakedamirojuru-tanetuwigo-woguvonisag-sitarovixut.pdf
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6026cf5dee275.pdf
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/lesebed.pdf
    • https://lotojenamiz.weebly.com/uploads/1/3/1/3/131381761/e6bf79.pdf
    • https://pedexanagokol.weebly.com/uploads/1/3/4/6/134635549/78f792e.pdf
    • https://waragiteket.weebly.com/uploads/1/3/4/0/134016771/fbaec65b.pdf
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ffb7fe8d5e8a.pdf
    • https://cdn-cms.f-static.net/uploads/4469349/normal_606a125852a82.pdf
    • https://cdn-cms.f-static.net/uploads/4427514/normal_603b9e43a0dfe.pdf
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/batuxo-kaxep.pdf
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd161bc9c0d0.pdf
    • https://meputaxuxiku.weebly.com/uploads/1/3/5/3/135304120/3140585.pdf
    • https://static.s123-cdn-static.com/uploads/4403271/normal_6008801e86ce3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/899f1f45-6227-42ad-af40-48961ea00ca1/15784881993.pdf
    • https://uploads.strikinglycdn.com/files/3198e39f-50c3-4ffe-9de6-7e0f3a67434d/compare_the_top-down_vs_bottom-up_network_design_approach.pdf
    • https://uploads.strikinglycdn.com/files/e1d8cad6-cc6e-4aef-b330-ebe0b2efed27/how_do_i_use_my_bissell_proheat_2x.pdf
    • https://uploads.strikinglycdn.com/files/c089351f-b681-43ce-b661-fe0f94308327/why_is_my_xbox_controller_charger_blinking.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010758.bin
76feefc0f6051e2f40802efe2d2e5c59978e77871564e55994181073534e58dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10758 5508 bytes
font_01_sfnt_off000119fd.bin
1cf44181341c4e845c0420d7ebd1ad17b83534040f530f7c5218aff0dd9370e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 10772 bytes