Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fab60a37074ba77…

MALICIOUS

PDF

85.4 KB Created: 2021-07-21 12:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 600107f48461a0fe9799ef8233d253f0 SHA-1: 35cd03c8a5aeaa7bf8e54db010f9f843fe2059be SHA-256: 8fab60a37074ba772df3bc268e1e2ebf39cf66f9ab3031e0c74359c19b0a3281
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable domains. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maility.pl/_ADRESuserfiles/file/48864695142.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vhf1hg9i9pj73aaia8nb4975p4/momitukinedo.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5c0068f5---43025002234.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/587fqubfhlhuh7a4b6rdhdc8a5/ripimesidedosewekob.pdf
    • https://chupwo.com/editor_upload/file/kizojaza.pdf
    • https://bestofbucerias.com/upload/file/913216440.pdf
    • http://slsnn.ru/content/file/deterufag.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/95040436124.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607081808fd59---karele.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a3e8c0f8299b57a5d0716dc08b67f129/17495918159.pdf
    • http://vickerycarpet.com/uploads/images//files/55723068162.pdf
    • https://gbagencement.fr/uploads/file/32768901139.pdf
    • https://kopari.hu/files/file/99830382765.pdf
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/xitifexunosib.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e903cc94c09---papulubalaranebevu.pdf
    • http://www.tobywells.org/media/fckdir/file/rejewaxerolek.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c2c2075ca---gegudezafopo.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f03ca54152b---91938503873.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7916684b05---26629734283.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdd5f6e46a---26565869629.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7f9abfcf950948830f7734a4ae83caad/gesawakago.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4763e5469d---84646733161.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073f36340409---kovinagiwoturumovumux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=adobe+after+effects+free+torrent
    • 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_off0000eb21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 16792 bytes
font_01_sfnt_off00010338.bin
baf861de8e42c0ea8a601a36f9ae62c5247e70ea41da03ba44bf3772eea89bd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10338 10452 bytes
font_02_sfnt_off00011b1c.bin
f7dafa0244d7c33f85f3a7fcd10ad53f8b1f4ebcf701239cd2e50bdcb569f882
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 17408 bytes