Malicious PDF — malware analysis report

Static analysis result for SHA-256 7944e2cb42699ef5…

MALICIOUS

PDF

69.3 KB Created: 2021-01-26 10:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a5d3a879663c837976001d34c0fb7071 SHA-1: 91ad03bfe05649e8e1ac4e61f85cb12a68b4e08b SHA-256: 7944e2cb42699ef5423797e5f8d06e9c7de622650225421574a809930031d1ef
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to create a link farm or distribute malware. The presence of an embedded URL and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior point towards a phishing or malware distribution attack.

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://traffset.ru/123?utm_term=gates+millennium+scholars+program+scholarship PDF link annotation
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/5543387.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/hijpGid/57473134461.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/haODijp/superhero_cat_run.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/zjgBheI/address_for_sports_connection_northlake.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/hgFhblp/64766611526.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/fieusTb/41140172796.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/jMhe4G0/9688998931.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/although_despite_in_spite_of_rephrasing.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/remamisidumukedomob.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/dukexajuj/mumegolixovetelan.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/backbenchers_punjabi_video_song.pdfIn PDF document text
    • http://fazafowunop.epizy.com/balomo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/adanga_maru_tamil_movie_hd_tamilrockers.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_off0000cf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 5376 bytes
SHA-256: eac0578806b3adb4a784027dc4abca21988dd37f4299aad3b87fe71c86245fce
font_01_sfnt_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 11424 bytes
SHA-256: 927d6cd88e5a4dd6a2586944f6638629bd8d490f56200070b34fdc6d542383cc

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