Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b3cd81ec344246…

MALICIOUS

PDF

85.2 KB Created: 2021-03-30 17:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9eceacad3b86b46f345e9bcd479f7555 SHA-1: ca4044969d40c5ae9ba4c9ae6ceb1b3e436cacc9 SHA-256: e2b3cd81ec344246cad11d14292dc8b049e8587c6c4008c9a1847558a41aacb5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to potentially harmful content.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=dsl-2750b+as+access+point PDF link annotation
    • https://cdn.sqhk.co/fowifabibu/ibohiIu/animal_sounds_sms_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/drjc6hd/42901120690.pdfIn PDF document text
    • https://mixunolonuwoja.weebly.com/uploads/1/3/0/9/130969204/lowebozopa_konopapazoz_rudasobu.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/fanexavobi_metusi.pdfIn PDF document text
    • https://sufimademum.weebly.com/uploads/1/3/4/2/134236216/vetuxorelobazol.pdfIn PDF document text
    • https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/5300252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeponowon/78742118117.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_432438dae7fc420e99dcf8a7e4929128.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_ed8226329fe94625be1163fcbee3837a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kofabube/tonok.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/deep_venous_thrombosis_prophylaxis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/c13_nmr_spectroscopy_notes.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_8c5e0ce22c5a4fdfad5816c76acd1bfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/flomasta_pipe_thread_seal_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/simple_decision_tree_examples.pdfIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_a7487ead8e684a8690d6358850862006.pdf?index=trueIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_33c8466fbd0143858f82f497e9a99baa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/27713174607.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/duxbury_braille_translator.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_82898328d26c4f1d91f48e1dae202e57.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_6364c746bffb49198fdf69fb9592f50a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ap_lang_rhetorical_analysis_thesis_statement.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_off00010e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 5480 bytes
SHA-256: fbf63193094ba00eadae3d24f28fab21f081b3d8e5c009c5217cb8414a2005f8
font_01_sfnt_off000120f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F6 11320 bytes
SHA-256: 22d9c1df74fa2524d1115fb3af12587741893ef70213e26124a78d0d856c6bc8

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