Malicious PDF — malware analysis report

Static analysis result for SHA-256 c901851feff36ec0…

MALICIOUS

PDF

71.9 KB Created: 2020-12-27 19:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d1815434d98dd42f2b48ae03f6fd5528 SHA-1: 9cf7fdb188ec25d4b51cebfaec0de44f8e7da5fa SHA-256: c901851feff36ec0091d6084f1a3d92fa642826ece2989710b2c002174586056
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to movie downloads, which is a common tactic for directing users to malicious sites. The presence of many external URIs indicates an attempt to distribute or redirect to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffking.ru/aws?utm_term=annum+innum+ennum+malayalam+full+movie PDF link annotation
    • https://cdn.sqhk.co/rabuzopat/ie7gj6G/wepifovopufositezajize.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/ichgjjG/gedisesefuxupaxise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_5fc3884327c04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416131/normal_5fc9f188427f5.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/CcthjXV/matapobre_meaning_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/h7ij4ha/21609991221.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/hfVjbqL/nonezenuwivemakak.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/fujiwezafof_sefiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f90a4d0af448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f97ed07f0964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/newopetusam/ella_enchanted_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/udemy_videos_free_site.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/48148852252.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_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 4792 bytes
SHA-256: 7e00390bf7ac35e3b080e1f50fd72e4fd6de2fb63a5336fc1c52af1999525c1c
font_01_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 10832 bytes
SHA-256: 839233d8af4a83e7e9d2d4cd89df862d7ff1e39aa16c53aca6e5015fd1164ab2

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