Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ab3162d767b975…

MALICIOUS

PDF

82.0 KB Created: 2021-02-26 19:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6cbf5389099b3f1a1c66b97a5c58a951 SHA-1: 143264bf05d354d2bf78bef8a003f40b09980d4e SHA-256: 22ab3162d767b9758cd3de9a273bacbfcd9f4319731af5d8d222d59590011adf
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, including one that mimics a search result for 'white pages brooklyn park mn', likely to trick users into clicking. The PDF structure and embedded links suggest it is designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=white+pages+brooklyn+park+mn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489035/normal_60237279ba09a.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/81887126279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6032bd64cba84.pdfIn PDF document text
    • http://bred-enligne.com/tonipugopefenilaseziyfmn1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_60390218d3fb8.pdfIn PDF document text
    • https://sadixudodexoz.weebly.com/uploads/1/3/4/2/134234615/851965.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/19908284325jg5wc.pdfIn PDF document text
    • https://towuzisutodugo.weebly.com/uploads/1/3/0/9/130969847/0f7e4.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/7726042.pdfIn PDF document text
    • https://niwanuve.weebly.com/uploads/1/3/1/4/131406473/1723331.pdfIn PDF document text
    • http://tovelksa.website/game_of_thrones_official_age_ratingxr9md.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5fef76bf7c105.pdfIn PDF document text
    • https://nakowubolitek.weebly.com/uploads/1/3/5/3/135349387/xuvojiwatatusag.pdfIn PDF document text
    • http://13millions-warzone.store/graphic_design_history_textbook8mkcg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fd33d94b1f05.pdfIn PDF document text
    • https://pegipipuw.weebly.com/uploads/1/3/5/3/135395330/c1014bd9797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/sword_art_online_alicization_war_of_underworld_part_2_final_season.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/multiplication_tables_up_to_30.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/xumezopibo.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_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 5552 bytes
SHA-256: 6b00f29d4674c8d41ca5037102fae08f9d67e1fef86150acca73f7cbbaa41c1a
font_01_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 10692 bytes
SHA-256: d8fb5afcdb1321572afd92bce617fb959e0e9c4e2fb3698dd59473dab2a7e833

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