Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfafb879d23747d…

MALICIOUS

PDF

79.0 KB Created: 2021-05-29 21:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 71b9cdc0d127fa5801c4e7be620e46ae SHA-1: ac42a3997523a4e50db2d1dbee89f3f5816ac28f SHA-256: 9cfafb879d23747dfe86d4f637e9f767f9258d58504a42d139bb5a7ae03e244c
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or distribute malicious content. The embedded document body, though heavily obfuscated, contains metadata related to PDF generation and a URL that appears to be part of a SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7069

Heuristics 5

  • 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
  • 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://gimoguvi.ru/123?utm_term=south+movie+2018++300mb PDF link annotation
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/6713198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471985/normal_6006f93d93038.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/finowuwa-wobufafufivi-kalaxekotakuvu.pdfIn PDF document text
    • https://manumuxalobo.weebly.com/uploads/1/3/5/3/135387638/6897630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_60451277cb955.pdfIn PDF document text
    • https://penatiwateli.weebly.com/uploads/1/3/4/6/134617533/45ee17346462f.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/fcd3eb8e.pdfIn PDF document text
    • https://mezikemopirexat.weebly.com/uploads/1/3/5/9/135993778/3698371.pdfIn PDF document text
    • https://xanowiporak.weebly.com/uploads/1/3/0/8/130814060/6fbd8.pdfIn PDF document text
    • https://zisetilu.weebly.com/uploads/1/3/1/3/131382786/8984385.pdfIn PDF document text
    • https://bilidugudixuxo.weebly.com/uploads/1/3/4/9/134902455/fagem_xolesipikivuju_gobodi_viwopebatasebe.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/8d9ba772cb68.pdfIn PDF document text
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/3138845.pdfIn PDF document text
    • https://nesojikav.weebly.com/uploads/1/3/1/3/131398336/d21f21184afc3.pdfIn PDF document text
    • https://kipofazusaf.weebly.com/uploads/1/3/1/3/131379409/felagi.pdfIn PDF document text
    • https://sujufejunuvevu.weebly.com/uploads/1/3/2/8/132814923/jirezevifofuwemotez.pdfIn PDF document text
    • https://pefoduzipim.weebly.com/uploads/1/3/4/3/134371740/30f935f.pdfIn PDF document text
    • https://vifexaxelis.weebly.com/uploads/1/3/4/4/134482988/siribepamejevid.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/kububeremiwor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5ff0f853571b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 5396 bytes
SHA-256: dd70d3c1de8404af01bee23ac2b08426561424f2ac935f29410f81d0dfa47cf3
font_01_sfnt_off00010eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 10848 bytes
SHA-256: 42455a35b473f7d75bcb6ab8faf7aaff077340e2d9cf2341d4e1b7d996327d68

Open this report in the interactive analyzer, or submit your own file for analysis.