Malicious PDF — malware analysis report

Static analysis result for SHA-256 7662dded34a7d02f…

MALICIOUS

PDF

88.9 KB Created: 2021-03-18 20:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f938f1b75e87539f0c3208e75dc8b254 SHA-1: 499b1ffccaeab841a3293476415c2cd95a634ee3 SHA-256: 7662dded34a7d02f0a8598a4943d0cb3c76df40e3737eaf8436fb787006ce0ab
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to games and potentially lures, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://resalured.ru/wix?keyword=hanger+unblocked+games+weebly PDF link annotation
    • https://cdn.sqhk.co/xanapaje/7OJjaRR/37562259673.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/jbjbou2/hand_drill_guide_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_60430c2d795b7.pdfIn PDF document text
    • http://fb-pageunderreview.com/refoxowivofutalubewebejob9ubbs.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hj4hfKn/neighbors_apple_tv_showing_up.pdfIn PDF document text
    • http://pimupafigofud.iblogger.org/wrist_blood_pressure_monitor_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5ff928e0295ef.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/born_to_run_1993_movie_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_6006e8f418293.pdfIn PDF document text
    • http://tarubexuwixam.iblogger.org/6298784355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493873/normal_5fc5d78801377.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/GMjcdgf/tusexijilekaze.pdfIn PDF document text
    • http://ourfanz.com/zojedavevbyyke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_6008f3f06f704.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://uploads.strikinglycdn.com/files/4c8a94fd-e521-4a2c-aceb-c07d543973ff/96646358995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bb0bdb-445b-499c-bf2d-0ff2522f865b/95047058892.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_3c57422303e04624afc9244df1723b39.pdf?index=trueIn PDF document text
    • http://jonegukum.epizy.com/facioscapulohumeral_muscular_dystrophy_treatment_guidelines.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_45b3bf47e44146c987b6a92343c6b756.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_5565a399bc4d477082306381b637b431.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_36e95a406a784e53971223ebb275a1e6.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_c1936031a9624e71b187c1750e1f449b.pdf?index=trueIn PDF document text
    • http://xapimiwosusuv.epizy.com/55864753536.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 5372 bytes
SHA-256: ecc464b22d4405c18d5b4629dc6d0f242c8337c47cb57bd284a3d26291b89a60
font_01_sfnt_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 1728 bytes
SHA-256: f57d37fd7df03c50984c46c858d0202d1782e3daebd4b599cb7a60dbd4a52b8c
font_02_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 11756 bytes
SHA-256: 8b407e41d3edfbb6ff1374660af95bfb07e3fe21e0aa97bc251487e780dc52bf
font_03_sfnt_off00014712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14712 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176