Malicious PDF — malware analysis report

Static analysis result for SHA-256 304e92ea20d96910…

MALICIOUS

PDF

89.6 KB Created: 2021-04-30 02:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7ce2c8690668326ade4264b48a08c569 SHA-1: d02e05e37c5c4a740b82f705c002f962687d4d5a SHA-256: 304e92ea20d96910f441f96f19841f19d65fdf5aa01921e80297abff479af327
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or redirection attempt. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing lure. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, potentially leading to further compromise.

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://kuzutuzo.ru/strik?utm_term=guerrilla+warfare+definition+social+studies PDF link annotation
    • http://vezerfa.xyz/31993490401mipj9.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/bizomuzururow.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/55175359428.pdfIn PDF document text
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/fc15f4.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/85505504800hehsl.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/cXjdDic/96370018499.pdfIn PDF document text
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/badelolol.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/ibohgia/85191326258.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/anker_keyboard_manual.pdfIn PDF document text
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/e0c49f01.pdfIn PDF document text
    • http://swiss-gear-top.xyz/48704121995juw34.pdfIn PDF document text
    • http://antonioit.fun/spiral_fracture_finger_recovery_time2asr0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb34db9c-3d09-49f7-858d-36551095486d/100_aos_de_soledad_resumen_capitulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/outlook_365_won_t_open_attachments.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/the_rising_of_the_shield_hero_light_novel_volume_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95719a0-6b19-4317-8707-1e68f6b69993/56529687100.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/how_to_get_manual_3_times_in_a_combo_goat_simulator.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_off00011e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E62 5140 bytes
SHA-256: ab927c01fb7489550c5a492b23974f1f952a01a2972b225ed1416e15c4872432
font_01_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 11564 bytes
SHA-256: 0f2a87cfd89d93d7c21bdf7d00df39717085d07a103ee93779122e1ecf9fca0a

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