Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad32f19392a488f…

MALICIOUS

PDF

70.2 KB Created: 2021-01-18 00:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 96797ebf4464ff2100facb364cfa36ca SHA-1: c671f1f8b2fec6f3a049f377642a5f147aabc195 SHA-256: 1ad32f19392a488fc76cc4d391c8490f316b35741a06c54cd6ccef1c4d6573c8
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 a large number of embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to this behavior, indicating the document is designed to redirect users to potentially harmful sites.

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://trafffe.ru/123?utm_term=conceptual+blockbusting+pdf PDF link annotation
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/zuxorizezom_vafipagijot.pdfIn PDF document text
    • https://site-1245653.mozfiles.com/files/1245653/lezeluvaritodetezo.pdfIn PDF document text
    • https://gafixipen.weebly.com/uploads/1/3/4/4/134444756/8482966.pdfIn PDF document text
    • https://delularisif.weebly.com/uploads/1/3/4/4/134482541/bakevubekejor.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/battery_calibration_2._1_apk.pdfIn PDF document text
    • https://site-1212500.mozfiles.com/files/1212500/free_after_effects_templates_logo_intro.pdfIn PDF document text
    • http://nowatora.22web.org/canon_mf3010_driver_free_32_bit.pdfIn PDF document text
    • http://jifoxife.66ghz.com/qualification_of_agrarian_reform_beneficiaries.pdfIn PDF document text
    • https://site-1168207.mozfiles.com/files/1168207/final_fantasy_2_walkthrough_arcane_labyrinth.pdfIn PDF document text
    • https://site-1172455.mozfiles.com/files/1172455/64806301546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejovixija.rf.gd/85132909877.pdfIn PDF document text
    • http://pasexojubil.epizy.com/front_desk_training_manual_template.pdfIn PDF document text
    • http://kosener.epizy.com/ajax_javascript_file.pdfIn PDF document text
    • http://pumejusatojajeg.rf.gd/fortnite_avengers_endgame_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/words_that_begin_with_letter_r.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/ambersil_40_protective_lubricant_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/dr_axe_candida_diet.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/bam_bam_bhole_kashi_song.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_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 5336 bytes
SHA-256: cef8cc9529e1cb9e90a7417d2bbc37d059f0641b689e775e7e4fedd950cb9c76
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 10476 bytes
SHA-256: 962572a159cd96ef15857443a46e81bcaa5c71fb1a2be010754f36db37d5a198

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