Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6b41beca2cef8c…

MALICIOUS

PDF

80.3 KB Created: 2021-05-28 21:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6aa17a5d467d57c23f670efbae464c32 SHA-1: b18057dc911c0cd1a5f85b020727ae4e52604a92 SHA-256: 6e6b41beca2cef8c7c202a785e893a8f1a56165466a226503804623cb2d544ec
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to gaming, aiming to direct users to malicious URLs.

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://jottigo.ru/strik?utm_term=how+to+play+cod+mobile+on+chromebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410433/normal_604b2b60110fe.pdfIn PDF document text
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/polojorebipadix_sizanujus.pdfIn PDF document text
    • https://putuxukive.weebly.com/uploads/1/3/1/3/131379249/pofewetojuxuraxumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475216/normal_5fe135bd0f0a8.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/bunepolebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5fd91669466a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5fff9546a0230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_60421ce05c713.pdfIn PDF document text
    • https://riwumoba.weebly.com/uploads/1/3/5/9/135965326/1287600.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/misufegevumagaf_saxokew_berusonube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5fc627995fa3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_605fa3f7117d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_603b6aca7b3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496828/normal_5fd86c6238707.pdfIn PDF document text
    • https://zigiruma.weebly.com/uploads/1/3/7/5/137517675/lukitixusazokin.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/duwinarutoresari.pdfIn PDF document text
    • https://fixugosotodig.weebly.com/uploads/1/3/7/5/137518485/nazumamaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_603a8b4a94f2f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4497359/normal_60b08b9e9349b.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/gabiwojafi_mapob_vibene.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/7a657257-98f1-4148-a1a9-419ce851f823/61097656804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5da50db-9b3f-4a94-abd5-e45f15294f9f/call_me_by_your_name_full_movie_free_subtitles.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD2 5496 bytes
SHA-256: 333fd1d6bf29949f5ba049e2f61594b155d86b1fed06b583716786ed89664bfd
font_01_sfnt_off00010f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F60 10684 bytes
SHA-256: 91f5ad900c8c1ebcf6c6582debe8a3ebffb7600db334aff388715f2f20578782