Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d2f359b2ec5c19…

MALICIOUS

PDF

84.0 KB Created: 2021-07-06 07:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40a354d58a7b2b811149e2f1e2051aa2 SHA-1: 104a42a4b689c87a2f77fa882ba01039b7245ac5 SHA-256: d0d2f359b2ec5c1909bc5da362c8408c4023917df57d07be22ec8031eddf0c62
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and does not provide direct clues, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://novichiha.ru/pic/file/65529511971.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/s331rj26aldk7gsf1qf27c6n8h/pidisumugiwevoxoneguv.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a76a9f38336930db5a5c9224850bc091/nutidav.pdf
    • http://katachizu.com/img/news/files/83263353168.pdf
    • https://oddluzanie.net/userfiles/file/remevo.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af712911616---xoreso.pdf
    • http://njf724.com/basefile/janatalnajafcom/files/11119458787.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/be875ec342442ab51603dad85ccbd949/64708482035.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bda53e254c7---lijamotuzujovalusekikole.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa66eb7164---jutowudorigabewafijixij.pdf
    • http://irk-yoga.ru/upload/files/debonixudeba.pdf
    • https://xn--80aaijzh9b.xn--90ae/documents/file/46198957613.pdf
    • http://hitecds.com/userfiles/file/vejaposotamewamuvosif.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/1d703d3b207a904c6fdd7bb2564d05cb/kezilabevorelitaxanol.pdf
    • https://laptopserwis.com/app/webroot/media/files/75547761239.pdf
    • https://muratay.nl/userfiles/file/57714560880.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/e53li59k2qjh4l2e9aogcqa0b0/bosoborejaruponemitune.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/2cde526885a91357881e1415f972eef2/gikelun.pdf
    • https://bitree.ru/ckfinder/userfiles/files/bopodofamokureludi.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074768f03caf---33744604487.pdf
    • http://museodegliarazzimarsala.com/userfiles/files/vaxizitut.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba34cd7332---fupefekalilod.pdf
    • http://a-kamen.com/userfiles/file/jobuxatitodikitero.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gatsby+questions+and+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e3.bin
9f7d08022af72a449194bc840d9fcf500f6c25520debcbae301dcaea50e2f011
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 17108 bytes
font_01_sfnt_off00011191.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 16792 bytes
font_02_sfnt_off000129a8.bin
feccf3b40eaa838e1bdb5f76352d01f86a1717eb16bf30fb9501db71bd3bbceb
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A8 10820 bytes