Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f2a35625d59929…

MALICIOUS

PDF

85.0 KB Created: 2021-09-11 22:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f68a6fcfcd4b0a8e461bb1180881383 SHA-1: a7f4a39177720025862af456b91206bf8d1121c5 SHA-256: 69f2a35625d59929ddff72ac9b5dcd43240d8b8858eb26ab6b2cd5528471b8eb
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing or trojan payload. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://needlugs.com/userfiles/files/kamadadim.pdf In PDF document text
    • http://rebizplus.com/userfiles/file/guperolizotovuwaletez.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/2540003340.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130c5907602c---gazem.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613427318fc41---defisatujawulu.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/38281298259.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/zogepopu.pdfIn PDF document text
    • https://noddy.nu/images/file/76726476773.pdfIn PDF document text
    • https://ienter.bg/files/64294191048.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/75755812657.pdfIn PDF document text
    • https://alev.az/userfiles/file/14449652315.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/24056816080.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/36448465983.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210909204546.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/7483108979.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/15393889911.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/98524695140.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/mavavovivupuligepulexupu.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/sumipux.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/medoku.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/puvikorekisowoxeguginupo.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/pumolomovovogu.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/suxuvobejidigazodu.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/befirilotowo.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/wiroforox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=android+app+advantagesPDF 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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 18056 bytes
SHA-256: b47e3b5b150fc171b71bd014e5a1261e7130e9bcb5414aa83c734bed2b5f331a
font_01_sfnt_off00011695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAC 10568 bytes
SHA-256: d4b1e324b0b164f9020780f00eaf29411b5bd6d39850d2a17e80ada4e21507b3

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