Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aa3fd72d926bc9…

MALICIOUS

PDF

91.0 KB Created: 2021-02-12 17:39:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f1ab44f4fdce523c939bd97c21ae262e SHA-1: 21aa8ba83d6393174482a82979f13a8fe8697285 SHA-256: 90aa3fd72d926bc916b0fee525574dbe2e006ce9dc82a37a9dea8580b11e836d
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to search results, suggesting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=rosario+de+maria+completo PDF link annotation
    • https://cdn.sqhk.co/bulixanejad/bHhhmhh/16197839688.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/hyhgJgI/lollipop_chainsaw_zed_theme.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/2gdjf1v/catchmaster_insect_trap.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/e1Fnnjh/cheat_among_us_pc_always_impostor.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/uucidid/scorpion_skins_mkx_krypt.pdfIn PDF document text
    • http://investmag.org/how_many_ragas_in_indian_musick6kgp.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hfYIigt/kalumazoxukeboturofe.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/WCHVib1/crush_the_castle_siege_master_level_101.pdfIn PDF document text
    • http://creditscorehelp.info/dirt_farmer_all_quest_guideqpfcw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kasuwevovog/sapipu.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/gw2_necromancer_guide_leveling.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/1796708470.pdfIn PDF document text
    • http://toxodetu.rf.gd/ipcc_may_2019_old_syllabus_suggested_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/63301188177.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/toni_cade_bambara_the_lesson.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/76568041249.pdfIn PDF document text
    • http://bapibalapu.rf.gd/lifolukononego.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8A 4908 bytes
SHA-256: 1ee3b9f9c76ab7c32c113ff33dcc787c060238ac1183abc1f2f40540d70308dc
font_01_sfnt_off00012d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 10372 bytes
SHA-256: 8cb76432e0931bca5fce73681725eda63087137b60e2f0029d4a13dfccbd3e6a
font_02_sfnt_off0001507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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