Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5a8681895efc9a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-05 18:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 247fd6fec920366bd3ab6a8fae05a540 SHA-1: 51657a1de6acc88aff4f8346eb41473faaa4a4f3 SHA-256: 6c5a8681895efc9ad867e947e5aa59b18a18591682cadf8bd714212aa3cbc369
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is `https://maypoin.ru/wix?keyword=rainmate+air+purifier+for+sale`. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of numerous unknown-reputation URLs suggests a phishing or credential harvesting attempt, or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=rainmate+air+purifier+for+sale
    • http://usacreditmonitoring.info/marlin_model_60_stainless_steel_scopeksj3y.pdf
    • http://badge-verification-center.com/13755034151if351.pdf
    • http://shop-onlinediscount.xyz/small_business_swot_analysis_exampleamnv1.pdf
    • http://topcreditcheck.info/what_are_the_characteristics_of_a_temperate_rainforestltvc1.pdf
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5fd997f5ca583.pdf
    • http://persequenteamsohbet.com/modified_overt_aggression_scale9wnat.pdf
    • http://blancop.xyz/is_monster_energy_drink_better_than_red_bull05n25.pdf
    • https://static.s123-cdn-static.com/uploads/4374986/normal_5fe54da0d74d2.pdf
    • http://gufutaca3.xyz/gta_5_online_money_cheat_codes_pc_solo_sessionwq1sa.pdf
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fe33f2b938e0.pdf
    • https://static.s123-cdn-static.com/uploads/4447631/normal_5fcb692a6e221.pdf
    • http://sks-expertiza.ru/30443996836lxoyy.pdf
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6022f60cc0775.pdf
    • http://chategratis.online/printable_emotion_wheel_for_adults61x5h.pdf
    • http://dukofinezamidol.22web.org/elementary_surveying_15th_edition_solution_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a3a2c02b-91da-4305-910b-15157f6b07b8/icd_10_code_for_compression_fracture_third_lumbar_vertebra.pdf
    • https://uploads.strikinglycdn.com/files/0cadadda-b22f-496a-96e6-3ec9c78ee69f/why_is_my_tumble_dryer_leaking_water_from_underneath.pdf
    • https://uploads.strikinglycdn.com/files/8bc3eba4-242d-4178-9a77-1512bb43837f/grade_11_college_biology_textbook_online.pdf
    • http://puwovejivu.rf.gd/31392300481.pdf
    • https://uploads.strikinglycdn.com/files/58561365-99dd-4a40-b3cb-3e0da6550c1c/trig_identities_isosceles_triangle.pdf
    • https://uploads.strikinglycdn.com/files/ef7bd72f-dce6-4a06-bc0e-e7156dd95101/niroxedera.pdf
    • http://nefigubisi.epizy.com/xupigevadirafepuna.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_off0000f177.bin
d769843eaf033a67f30d25fc0dfb8b55757b4eba9f846eaf69d94bf371e9d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 5052 bytes
font_01_sfnt_off00010294.bin
1209b715af727a56aad4f2e0e52af61c46abf7436dbbc9f20d7b92d10605e034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10440 bytes

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