Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1aa3f28ebb6467b…

MALICIOUS

PDF

64.6 KB Created: 2020-11-17 05:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3812181b6f70149d7f6fa5c822ebba4 SHA-1: 5e4fc973e97df8663da8b278007c2f241976ca24 SHA-256: d1aa3f28ebb6467b8b3a7a5e7fa40a86d166c54c549d288b935e8f87e1b65746
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful sites. The presence of the URL 'https://traffine.ru/123?utm_term=dual+apk+unlocked+all' further supports a phishing or scam-related attack pattern. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=dual+apk+unlocked+all
    • https://refaxoke.weebly.com/uploads/1/3/4/6/134602084/4328817.pdf
    • https://jefapijuwenumik.weebly.com/uploads/1/3/4/4/134435530/bixilodub-retamamedakeja-sebaso-momemewidok.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f9bfb86ceebb.pdf
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/e1e0b.pdf
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/0350ded95ca9.pdf
    • https://rarowovi.weebly.com/uploads/1/3/4/6/134664267/pokaguru-veluxe-melafobosab-kevaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mejediparaxi/11034196553.pdf
    • https://uploads.strikinglycdn.com/files/2170f1e0-4cbc-43b3-b118-0f7fd895776c/33933562066.pdf
    • https://s3.amazonaws.com/rozebofukixus/bryan_elementary_morris_alabama.pdf
    • https://s3.amazonaws.com/lekizopiloref/castrol_crb_turbomax_15w40.pdf
    • https://s3.amazonaws.com/fosalizuzu/neonatal_birth_asphyxia.pdf
    • https://s3.amazonaws.com/dibedamoka/persona_3_mitsuru_date.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c372.bin
523ffae6fc7aa6feb1b45d6be237cecc6fd7f3cd358edbf1757c32f062d6e2f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC372 4856 bytes
font_01_sfnt_off0000d416.bin
40d8eded3d8a7505729e677db1875681b0935e0149f158fa902a47dd7bd2653f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD416 9940 bytes