Malicious PDF — malware analysis report

Static analysis result for SHA-256 9348a610cf1d775f…

MALICIOUS

PDF

89.0 KB Created: 2021-09-19 02:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 703e942dc987b0cbb83590e1f855e5ad SHA-1: 51fdd9208cf7d900e928b7a0ef5c5732160d4540 SHA-256: 9348a610cf1d775f77eaa1ee422e7caa5fbb355039d50a35668ac57a198551ac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to potentially disposable hosting sites, suggesting a lure for phishing or malware distribution. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://felicitareonline.ro/ckfinder/userfiles/files/84538481900.pdf In PDF document text
    • http://ekorob.pl/userfiles/file/80062873870.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/wedekegofo.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/15523553528.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/88913271391.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/62475935789.pdfIn PDF document text
    • http://rurisnet.org/images/file/63412854540.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/getedesagafisujap.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/77629015375.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/77680550398.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/kagonajo.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/75484338518.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/58599558254.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/97936378122.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/ratiwodopiwejasa.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/laboma.pdfIn PDF document text
    • https://glozorcom.merlak.ru/userfiles/file/zinovigagawigixu.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/46756471456.pdfIn PDF document text
    • http://greenld.com/userfiles/93891642263.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210916083803.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/4021320187.pdfIn PDF document text
    • http://benly-carson.com/product/files/voluwemoretulax.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffa4be97da---sujizarudinelatizeketiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cannot+save+contacts+androidPDF 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_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 17656 bytes
SHA-256: 8bedeb48be3af91a5c51f6ece71f738fe9f2e84e4d67dd478515dc56876fb34d
font_01_sfnt_off000126e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 10416 bytes
SHA-256: 10ff3c139d7800d6069b2f82b5b1d0db5568cb891e51b01366216f1933dc2250
font_02_sfnt_off00013ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.