Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a7002fc025d37b…

MALICIOUS

PDF

75.2 KB Created: 2021-01-21 15:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7a24ee24b9679ad7cb57c950c53baf8c SHA-1: eee804d86a0d65809950f3d9be45adbbb7b838b4 SHA-256: b9a7002fc025d37bd4f78e2b467b27871305e05a86e02b9c8d8094845888f9b7
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=japanese+school+uniforms+costume PDF link annotation
    • https://kapupidaxor.weebly.com/uploads/1/3/5/3/135386814/bobapiratapamanuv.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/1403268.pdfIn PDF document text
    • https://site-1245341.mozfiles.com/files/1245341/junotaraduvofon.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/xaduk.pdfIn PDF document text
    • https://site-1176222.mozfiles.com/files/1176222/apple_music_90s_rock_playlist.pdfIn PDF document text
    • https://site-1168326.mozfiles.com/files/1168326/66952030089.pdfIn PDF document text
    • https://noxazevoda.weebly.com/uploads/1/3/5/3/135348256/mubozoru_vafufax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gizonukorad/albumizer_7._4_free.pdfIn PDF document text
    • http://wonetone.rf.gd/rijedolugux.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/63279241198.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/xiwuniwemiduvijonigoson.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/97761004886.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/android_os_for_laptop_64_bit.pdfIn PDF document text
    • http://pakilapawunafep.epizy.com/80390416779.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/98070995218.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 5128 bytes
SHA-256: 11079227ef346fb786c1afc02404ec2489e316a73e7d9fb8a9ea7c1229f22606
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 11204 bytes
SHA-256: afd9ccc03da22f28331203db2bfa4cdc4427c59c05148f16cabd93a89463da96
font_02_sfnt_off000111af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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