Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0970afab9a4a354…

MALICIOUS

PDF

76.1 KB Created: 2021-05-02 01:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5341d65deb1b42e0d56d214306e8a2e9 SHA-1: 9bc1dfc733aad4b5b451e30281dfc5acf64ccf2d SHA-256: b0970afab9a4a35411637f0f80375acc91365c89014a46d6227a778d54cecdc1
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure. The presence of an external URI and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=haier+portable+air+conditioner+12+000+btu
    • http://xelutorul.iblogger.org/bruno_bettelheim_the_uses_of_enchantment.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wopari/caresource_ohio_provider_forms.pdf
    • http://rapuzezu.epizy.com/69405932121.pdf
    • https://uploads.strikinglycdn.com/files/9091a5a7-eb41-4526-9d85-3616402e70a6/instant_hot_water_heater_kitchen.pdf
    • https://uploads.strikinglycdn.com/files/16ce39be-b764-4f7c-8437-f4493d8981c0/86332673852.pdf
    • https://uploads.strikinglycdn.com/files/137ee85f-eec7-4bc1-94f9-a9f830dc0c1d/80048154039.pdf
    • http://sirevonigira.epizy.com/kenwood_ts-440s_price.pdf
    • http://visisobaropa.epizy.com/4181036716.pdf
    • http://kubagaxupusu.epizy.com/aluminium_fabrication_guide.pdf
    • https://uploads.strikinglycdn.com/files/b70bc83f-1d91-4404-b904-658b649f8d0c/gazifu.pdf
    • https://uploads.strikinglycdn.com/files/58da979c-94b1-45eb-8ec8-6925aa020370/88777109592.pdf
    • https://uploads.strikinglycdn.com/files/66a5e025-0c6c-49c5-9e09-1d8058dc8597/can_i_get_a_new_remote_for_my_lg_tv.pdf
    • https://uploads.strikinglycdn.com/files/f5a5ca20-631b-4805-b732-437fde484c55/does_nordictrack_have_bluetooth.pdf
    • https://uploads.strikinglycdn.com/files/d2fafe97-bf44-4959-af6f-655e102125d4/what_are_the_2_types_of_cpt_codes.pdf
    • http://rufuvavigesu.epizy.com/zixigudabodujijawaz.pdf
    • https://uploads.strikinglycdn.com/files/a367d510-30af-4553-b03a-81cc25fb33f6/nibutidefavivatolo.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/jisef.pdf
    • http://sizatopus.rf.gd/everstart_maxx_automatic_battery_charger_and_maintainer_manual.pdf
    • https://s3.amazonaws.com/nabifovu/afterlight_free_apk.pdf
    • http://jilagikudi.rf.gd/phet_balancing_chemical_equations_simulation_answer_key_challenge_questions.pdf
    • https://uploads.strikinglycdn.com/files/f9303cb1-eed7-4479-88b4-7d2440497a44/53280008578.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba4.bin
0bb589a57b94b35ff89c30163a8aa7096b22dd308d69ff53be71ca5b9ba0c4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 5316 bytes
font_01_sfnt_off0000fdbf.bin
fb9e95465effc4d64b576483a06733fd9856c746ba2b5352caa0f665c8767306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 10784 bytes

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