Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4a9281d6f78b0b…

MALICIOUS

PDF

67.7 KB Created: 2021-04-03 06:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0253609c5c70020e6457021db9be8866 SHA-1: 7a4185498a164269884c10c8493e0e30d33b049a SHA-256: 4a4a9281d6f78b0bde17dd33dd58c218e65ca8494615b71f6585393b6dd4b7db
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not directly executable in this PDF context, suggests potential for further malicious actions if the document were to be processed in a way that allows script execution.

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://jottigo.ru/wix?keyword=thomas+kinkade+disney+cross+stitch+tangled PDF link annotation
    • http://fuxinagerepika.iblogger.org/dogil.pdfIn PDF document text
    • https://junanopawakeza.weebly.com/uploads/1/3/3/9/133999625/8007989.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/wRfjfiN/jokunet.pdfIn PDF document text
    • http://snail-case.store/chogada_tara_rangila_tara_song_videocxbi3.pdfIn PDF document text
    • http://xonibiz.22web.org/vshare_for_ios_8.pdfIn PDF document text
    • https://jotozorofelafik.weebly.com/uploads/1/3/1/4/131405965/8839087.pdfIn PDF document text
    • http://my-favshopg.online/how_to_clean_a_bella_coffee_makerk3qsa.pdfIn PDF document text
    • http://gitodejigo.iblogger.org/blogging_for_dummies_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/jdjhn2S/youtuber_skin_for_roblox_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogepep.rf.gd/vuzixub.pdfIn PDF document text
    • http://suvubojetixag.epizy.com/multi_storey_building_project_report.pdfIn PDF document text
    • http://nejowubixulifud.rf.gd/gifted_and_talented_worksheets.pdfIn PDF document text
    • http://desakoda.rf.gd/tolivekinixobinot.pdfIn PDF document text
    • http://nidedos.rf.gd/59558706495.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/villager_trading_guide_minecraft.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/numizisakozeb.pdfIn PDF document text
    • http://suzusufiwavel.rf.gd/pilegumexebadosakuwiwep.pdfIn PDF document text
    • http://genenapukiral.epizy.com/aqa_a_level_chemistry_specification.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC899 5468 bytes
SHA-256: b318dcad2d7fff2c5963e59d542ff479846964b48e072636a325eb90be2d940d
font_01_sfnt_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 11264 bytes
SHA-256: 1960789d81296c893faa0ff95155ca36f5c4444219897b0c7e1cecf7f6767f49

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