Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ef2115b39dd910…

MALICIOUS

PDF

82.9 KB Created: 2021-02-11 05:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 907eb985f8187de7f7ac186815e9844f SHA-1: 9df8dd51ad65f2031c7da5c235200546db01d859 SHA-256: a7ef2115b39dd910d6d687e37c0e08fe74f1c8bc8ad9d8cd1e4e5ea927a7dc40
154 Risk Score

Malware Insights

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

The file is a PDF document that contains a malicious link, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The link, 'https://crophysi.ru/123?utm_term=the+master+game+graham+hancock+pdf', is likely used to redirect the user to a phishing site or to download a secondary payload. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, but the presence of a malicious URL within the document body is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=the+master+game+graham+hancock+pdf In PDF document text
    • https://cdn.sqhk.co/kinemefuwa/H5iby1d/mokolifotub.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/ebjfOBa/best_free_multiplayer_shooter_games_on_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/rabawula/NjhhaF1/baby_alive_baby_grows_up_doll.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/dXMjfja/vagexasaxefo.pdfIn PDF document text
    • http://chatik85939775.fun/gikigobaxugexodyls7r.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/hehbkC4/nail_art_tools_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/icjjBQu/infective_endocarditis_unspecified_icd_10.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/Ehf2Dig/99113958142.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/dCidjh4/tie_dye_shirt_patterns_with_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/hgJgcTD/maxekubudil.pdfIn PDF document text
    • http://idealica-italiaofficial.site/73887963577lc3s6.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/igJJTic/spinal_tap_11_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/ghii6gi/18622493178.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/heTibgg/rally_championship_2000_free_download_game.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/wifiduxezo/zikubekupuraxevakivowox.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/kajetumusolosa.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/zupubojinojulepeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/bm_sharma_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/10610031602.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/goresoda.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/34054385909.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/world_history_gunpowder_empires_answer_key.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_off000105a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A9 5548 bytes
SHA-256: b1dd9e92f8e6a8779cc4ae2f2d1fc165c847adec050661ffdf906a6df574022e
font_01_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 11484 bytes
SHA-256: b9de8449aaadb62060985ee455b2345b0a3ddf7cf570a72fc09842603605d230

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