Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ab9d122d0e1865…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 03:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 37df1e196e649aefaad22052eeb60703 SHA-1: 602d8976d4360f08fe2e991e38759c6dd814bbde SHA-256: f9ab9d122d0e1865cd3c4e036c82a55ed502a096888b3772706d20236d1edf49
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wb?keyword=shakespeare%20globe%20guided%20tour PDF link annotation
    • https://cdn.sqhk.co/rivotoxupow/aQE4Big/cycling_bike_tracker_zeopoxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_5fee99cdc87f2.pdfIn PDF document text
    • http://niwobupiku.iblogger.org/imm_5562_form_canada.pdfIn PDF document text
    • http://ragadugizidej.22web.org/nutrition_information_southern_fried_chicken_breast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5ff42db64fcd9.pdfIn PDF document text
    • https://cdn.sqhk.co/wokupogogote/UjbtS2D/nirvana_game_of_life_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_60271fb5ed19d.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ggHhh9o/96509255882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fdde92db2683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gipenebome.epizy.com/rose_adagio_piano_sheet_music.pdfIn PDF document text
    • http://sojoramuf.epizy.com/86114685751.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/45156796073.pdfIn PDF document text
    • http://zaxodeziwepaf.epizy.com/tavukirifofugonusorel.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/the_voice_coaches_perform_dream_on.pdfIn PDF document text
    • http://tanijug.rf.gd/my_photo_clock_app.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_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 5528 bytes
SHA-256: 75a7cf2a3c6c0fc9bc07f8b3dbcff874e6993eb442542f5f0c40e761ff1db392
font_01_sfnt_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 10760 bytes
SHA-256: 6d5c955d05f753c3499ebca90ca27881aaef16f0de135f73fba6fbd3abc3867f

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