Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aec07d1f53c9d16…

MALICIOUS

PDF

69.5 KB Created: 2021-09-26 20:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3aacde4843905139e0d1f23acc4c9d94 SHA-1: e542fc151b0dbfc694d4004f9fcca61990c17570 SHA-256: 0aec07d1f53c9d16db5f98ef284781277f47e09f647b235f1bdb3514f1f105d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm strategy, with numerous embedded URLs pointing to various domains, some of which are unknown or potentially disposable. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or content-luring attack vector, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://2acontractor.it/images/file/44034293024.pdf In PDF document text
    • http://architettomontanino.eu/userfiles/files/1016819989.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/ralitawokufup.pdfIn PDF document text
    • http://realcomfort.ru/content/upload/file/82753904396.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ff3a38f40f0dde30e9bc804399ed3b27/87390858932.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/jejesusetomixugekafisotok.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/77468328864.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/zebogo.pdfIn PDF document text
    • http://vbond.hk/editor_upload/file/19820583046.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/kijafekedaxojomaregura.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/64688900923.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/xilupalodev.pdfIn PDF document text
    • http://zenithmetals.com/files/zirisuwaxet.pdfIn PDF document text
    • http://chinahongji.com/d/files/tovagadakewosusozeni.pdfIn PDF document text
    • https://ms1oke.com/contents/files/miviwopeta.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/rovipelepunusuvufexefarov.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/fumamexegoxazolo.pdfIn PDF document text
    • http://www.bash.cl/media/file/26675135583.pdfIn PDF document text
    • http://hidropro.hu/upload/vizerasubaf.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/32897471915.pdfIn PDF document text
    • http://panova-art.com/files/file/niwiviripusuwew.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/27038768111.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/gelidukisisopor.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/41264688876.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/botujodobuwugapowikiwejub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=justice+league+cartoon+movie+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F2 10956 bytes
SHA-256: f99d026315f9e0e6988f59a679d010d4693bebbdb02bc4d88c3c29951b69eec0
font_02_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 15620 bytes
SHA-256: 611d401458d8836f0331bd72357f5571476c94ff36482d77b8acee0ba65a6ba3