Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25de9a58ca4a23a…

MALICIOUS

PDF

87.2 KB Created: 2021-09-19 09:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bcc6263fecedc8bf25e69296c936b3cd SHA-1: b0d23759a591d515e1fb7074dd6e7a95b1a4dc54 SHA-256: f25de9a58ca4a23a1932b95ea4bfb2686b5d5b4b685cdd12e74fa6153f1a467d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded URLs, many of which point to disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely to manipulate search engine results or redirect users to malicious sites. No scripts were extracted, but the presence of many unknown URLs suggests a phishing or content-luring attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • 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 http://life-homeshop.com/asset/uploads/files/zanilemadonewiza.pdf In PDF document text
    • http://zehanbiopharma.com/upload/files/japoxorixosejunulos.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d9d92a3a44244032fff19a8d01a89164/7879527604.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/jifigat.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gimujegusomonalutuxa.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377b8820069---legifoleruzate.pdfIn PDF document text
    • https://yellowstonewildlife.com/mafigazemuzuvokurofojaret.pdfIn PDF document text
    • http://boldogelet.hu/media/54864257452.pdfIn PDF document text
    • https://digireg.ch/upload/gugejikixas.pdfIn PDF document text
    • http://keyday.ru/files/files/29188348034.pdfIn PDF document text
    • https://rcot.org/userfiles/file/33602373758.pdfIn PDF document text
    • http://decorstore.eu/upload/file/42501423448.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/58029668349.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/lonifisisaba.pdfIn PDF document text
    • https://photofetimages.com/posezirulipotebadelepax.pdfIn PDF document text
    • https://afma.pt/site/upload/file/24908576795.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/92534708183.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/15881114676.pdfIn PDF document text
    • http://mopron.ru/upload/files/28846742176.pdfIn PDF document text
    • http://hexindechem.com/upload/files/75599641149.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/55480235204.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/24739710514.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/mixevosegu.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/51491185418.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/52340877029.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+new+mutants+123PDF 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_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10508 bytes
SHA-256: 274aa23d8d4f9a41c05e52dc17f363f90cd7f3cd0eb8c7151666fb04a28f9737
font_01_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 18584 bytes
SHA-256: 800a88e204ac959be8a91538d2031241bc6a2401352ddc1b4a738c4a7285c101
font_02_sfnt_off00013709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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