Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf17a7476b8e32b4…

MALICIOUS

PDF

79.7 KB Created: 2021-02-24 07:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 024be142ac95886febb646254a608569 SHA-1: 6fc14065a2fa510feaae0ee07c59f4515cec8c23 SHA-256: bf17a7476b8e32b44702b9a421a4715201b3dde2c19caf0651cab1048fafda07
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 'http://iciapp.xyz/7426589764izmo7.pdf', suggesting an attempt to distribute further malicious content or engage in SEO abuse. The document body, though heavily obfuscated, contains references to 'user manual' and application details, likely serving as a lure.

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 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://baarspo.ru/wix?keyword=vizio+d+series+50+user+manual PDF link annotation
    • http://iciapp.xyz/7426589764izmo7.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/8667076.pdfIn PDF document text
    • http://lishop.site/11238325394k3w1g.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/pudaxazude-liredaga-dupuzi.pdfIn PDF document text
    • http://fredo.run/stainless_steel_6._4_crash_on_startuplzy0p.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/pajibotulinanop.pdfIn PDF document text
    • http://golden-bridge.pro/what_are_the_5_general_categories_of_sensory_receptors6k48w.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/xiravip.pdfIn PDF document text
    • http://www19216801.site/20339355151x2149.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/belopudevuzuza/watusibiligovopo.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/speak_out_intermediate_answer_key.pdfIn PDF document text
    • http://kufelinal.rf.gd/19196634728.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/sheet_music_armband_tattoo.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/escape_room_game_answers_level_82.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/do_any_taco_bells_have_chili_cheese_burritos.pdfIn PDF document text
    • http://lemenugedo.epizy.com/what_does_kcal_mol_mean_on_a_fitness_tracker.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/33369673134.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/oppo_95_vs_105.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_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 5252 bytes
SHA-256: d255315b4b6a84d71b07b75eac5455d998408d5622c4a2587c831705d5a4e377
font_01_sfnt_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 10368 bytes
SHA-256: 68935d7e9e1b91aa397fc17700b9da5426f19063660d8f5c9dab66edbea11898

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