Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aeb2a9d8fa676b…

MALICIOUS

PDF

70.2 KB Created: 2021-03-02 19:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 91c390ecf47a2f4dde61c9143ccebb1d SHA-1: 30475c21e405558b710271f56bbcce9540433b9a SHA-256: c3aeb2a9d8fa676bd1899c22a9369e99d7d1950600cf518ef18f535ea74badd6
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing lure or a mechanism to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a search query, reinforcing the phishing pretext.

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 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://fokemale.ru/wix?keyword=blue+and+purple+make+what+color PDF link annotation
    • https://cdn.sqhk.co/wewowedim/jHIaKNq/46940502594.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/gg8hdAM/firefox_private_network_vpn_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/hcLgeji/zogovit.pdfIn PDF document text
    • http://justiciaforjustice.com/fender_champion_100_review_ultimate_guitarzheye.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/ib4Jq7z/rokesonamutubuwax.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/cdhhds5/sojukejexezijojofusibu.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/icheXjh/52269592800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ff5c05243249.pdfIn PDF document text
    • http://nicepics.xyz/diary_of_a_wimpy_kid_wrecking_ball_to_readot7vx.pdfIn PDF document text
    • http://tersq.fun/trial_balance_exercises_with_answerssyg8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_603c2daaaa4e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503767/normal_6008cb9b4e0d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5fef8418dbe87.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/axDr4hh/fancy_car_names_for_dogs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rituruve.epizy.com/vupopop.pdfIn PDF document text
    • http://gamebunamol.rf.gd/why_is_my_battery_light_flashing_orange_dell.pdfIn PDF document text
    • http://telebil.rf.gd/aua_guidelines_renal_cell_carcinoma.pdfIn PDF document text
    • http://guvewenif.epizy.com/xamakebosimos.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_off0000d5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BE 5340 bytes
SHA-256: 9983593ab0e312efc3f26b9bb965d4872af3df8ef1511f5eb0df805b6eb4344e
font_01_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 10592 bytes
SHA-256: 0a124b0a6dca12c2461efd798854089d16b0109fb956447964de4ec8a83fc366

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