Malicious PDF — malware analysis report

Static analysis result for SHA-256 3802581ad8bdd3d6…

MALICIOUS

PDF

75.8 KB Created: 2021-02-08 04:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 65663d7fbdc387d15e72d78f532cab80 SHA-1: e4392cf491a75d8afd0ddf6178a7c0788deff959 SHA-256: 3802581ad8bdd3d67b1b1f0668bdc2c401f74d5402db15a79cc4fdd82d4ebbbf
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 high likelihood of malicious intent. It contains numerous embedded URLs pointing to various PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and the overall structure strongly suggest a phishing or content distribution scheme.

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://leonvi.ru/aws?utm_term=agree+disagree+essay+sample+pdf PDF link annotation
    • http://jekebes.iblogger.org/lisetogilo.pdfIn PDF document text
    • http://potoborotagivud.22web.org/agreement_template_google_docs.pdfIn PDF document text
    • https://cdn.sqhk.co/vabolepibe/iiunahg/my_rental_girlfriend_celina_route.pdfIn PDF document text
    • http://japuwakimawod.iblogger.org/weather_report_west_hartford_ct.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/ha8jeBu/sonny_liston_child.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/M8jfKii/fapufiguvonuxiwanoxofa.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/Jhegcif/nyan_cat_space_journey_game.pdfIn PDF document text
    • http://jamonomikusuka.22web.org/avast_android_virus_definition_update_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/fjjiaif/10428059207.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/hf0jajc/vodafone_yan_mda_sifre_alma_mesaj_gitmiyor.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dZX1Uu5/murder_mystery_box.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/jigg74Z/whatsapp_status_video_download_hd_app.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
    • http://badememaveg.rf.gd/pomamenunakizobesil.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/apus_launcher_free.pdfIn PDF document text
    • http://vatilibudavelit.rf.gd/st._augustine_confessions.pdfIn PDF document text
    • http://sakofosepemu.epizy.com/lateral_thinking_logic_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/film_avatar_720p_sub_indo.pdfIn PDF document text
    • http://bipaxoxibiva.rf.gd/7597100085.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 4944 bytes
SHA-256: e96cc3c42ccbf18f6da54f0015fd3b08fff6498fcbca8ebdf5297ce4548227aa
font_01_sfnt_off0000f1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 10128 bytes
SHA-256: 847a2f5b9d4b69cd0863ee17de6c38488b4cc03bc7fca3e5f9421d4fb0e7aa72
font_02_sfnt_off0001142b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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