Malicious PDF — malware analysis report

Static analysis result for SHA-256 3774dfa6435dfc1f…

MALICIOUS

PDF

1.11 MB Created: 2021-03-23 18:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b5b5c1b4b20b9cb949877ad7b0f097b SHA-1: 7a6290bd2ba581f30aa25e97648de07e4c398a55 SHA-256: 3774dfa6435dfc1f7de8450111ff2f4be1b2f4ec574baa2a61b66ecee73cf9a0
106 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of an advance-fee scam, using language related to lotteries, prizes, and courier deliveries. The presence of multiple embedded URLs, including one pointing to 'midufefew.ru/award', suggests an attempt to direct the user to a malicious site. Although no scripts were explicitly extracted, the PDF format and the nature of the lure strongly indicate a phishing or social engineering attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0172

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://midufefew.ru/award?keyword=joint+venture+agreement+sample+pdf
    • https://cdn.sqhk.co/texonatuzi/eibiajb/evertale_characters_list.pdf
    • https://cdn.sqhk.co/zarudaletok/idiejbV/dumenudeverekisubizikut.pdf
    • https://cdn.sqhk.co/limiwebu/lifUgd5/youtube_kids_movies.pdf
    • https://cdn.sqhk.co/lerapuraroke/geigyC8/lightmv_video_maker_with_music.pdf
    • https://cdn.sqhk.co/golemejexeno/ifUhcsU/rogozoxitefavugukota.pdf
    • https://cdn.sqhk.co/guwuweri/jJjgjfG/emergency_contact_form_template_excel.pdf
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/b23baa4c0.pdf
    • https://lutividagij.weebly.com/uploads/1/3/4/8/134896544/senenejepikiwek_wozopipokijiwo.pdf
    • https://cdn.sqhk.co/fuluzezufe/cXib0aj/tank_heroes_tank_games_mod_apk_android_1.pdf
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/19d72.pdf
    • https://cdn.sqhk.co/buzovegom/hbiwHhd/15719500680.pdf
    • https://cdn.sqhk.co/gusoburet/EejejfQ/hanes_boxer_brief_sizing_guide.pdf
    • https://cdn.sqhk.co/niporatibu/vghBlie/78845104602.pdf
    • https://cdn.sqhk.co/turaxulefa/dMibhh0/96136474000.pdf
    • https://cdn.sqhk.co/gidetixi/jiLjeHe/never_have_i_ever_dirty_questions_for_guys.pdf
    • https://cdn.sqhk.co/vobilurerire/gj2ifgj/best_nigerian_praise_and_worship_songs_2019.pdf
    • https://cdn.sqhk.co/wapogade/c46TLrR/37168902828.pdf
    • https://cdn.sqhk.co/sutazojawote/hdgdnhf/razasinuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vavabi/ideal_gas_law_worksheet_answers.pdf
    • https://s3.amazonaws.com/wixanarer/xevika.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_off00116609.bin
35db9464c1b71ddc67bf27430b0ebf4501ce05c0efc61d1b095a5ede2c743ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116609 5412 bytes
font_01_sfnt_off00117870.bin
f88d00b464adfc99809249643e3aca805f16ef87e47ed95a6c0fd79e78fb0b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117870 12044 bytes

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