Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4379104d6a941e0…

MALICIOUS

PDF

65.1 KB Created: 2020-11-20 08:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4697189f7de2790e7a336389e3b3a8a1 SHA-1: 95765150b7350ddc37db585c696a6c7feecb3854 SHA-256: f4379104d6a941e0d60855ec65820801a3e64a3853e53c2eeedd999b35063ac6
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/aws?utm_term=calhoun+county+alabama+accident+reports PDF link annotation
    • https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/d6845b7fc99e7a9.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/54f421.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/wilugugo/27481639662.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/nojozo.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/a_level_maths_p3_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/history_of_indian_english_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/27933885363.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/advanced_vocabulary_words_list.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/whatsapp_update_for_nokia_asha_501.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/monument_14_sky_on_fire_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/48963786341.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/radio_broadcasting_script_tagalog_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/ap_bio_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/67772002443.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9B 5460 bytes
SHA-256: a38e1ac5669b466d702add12cb9929e06b5a7bf9682d0119a0bd878982612257
font_01_sfnt_off0000d1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F7 10732 bytes
SHA-256: 107fa33e286b219eb8f4240a763b9de1749d265978009639937c70109b0b3c4b

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