Malicious PDF — malware analysis report

Static analysis result for SHA-256 04794c5e3fbc06d8…

MALICIOUS

PDF

80.1 KB Created: 2021-06-28 13:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 197a29046380d3b03c65f479859b3a95 SHA-1: 7600fc09aa09da9afabaab5d40f28a610996713b SHA-256: 04794c5e3fbc06d8db8adc5165ed688508180a94d1b1ac9fd82f48533590f934
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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://agiusfuneraldirectors.com/files/file/juxugolepefivekek.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c86af06f43---lexawesojikemi.pdf
    • http://gancza.pl/userfiles/file/tazivosapakefugovapizubu.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c434b36a93---girenazafigowazifenifu.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac080598b4---84354726603.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16095cbdc9f0b7---tonizolodatisise.pdf
    • http://thingsantiquesla.com/userfiles/files/zobobiv.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d5120a99b6c6d460e892c1ed81118ec4/zoxopogafon.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b105aaa0---5013378468.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4bc86b644---doboso.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e64b37ea7c---xazubatejefavaz.pdf
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zojuteniwidubezepal.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/ciuveukbe0khif7fmoo7cfjm11/lumiro.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9da593dc7---50957690454.pdf
    • http://reicar.dk/userfiles/file/62758413617.pdf
    • http://greenplanetnepal.com/userfiles/file/pepudigiwi.pdf
    • http://digemnd.com/UserFiles/file/woxitemonokoruripeluloli.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a527999f80---68333338269.pdf
    • http://otvorene-srdce.sk/userfiles/file/61197920503.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e058887e44---dabonufezaxedufojebiz.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t0qvp0pdrnto1oa99vr1lb0tma/lodapizapopoxiv.pdf
    • https://laplacedesstores.com/upload/file/sotamu.pdf
    • http://champaigncursillo.com/userfiles/file/18506710226.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=apc+new+learning+mathematics+class+8+solutions
    • 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_off0000d144.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD144 16792 bytes
font_01_sfnt_off0000e956.bin
178d433a9dff3962db5c981785fc5af55562b3e848c6158f37d25499d26a86da
pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 17388 bytes
font_02_sfnt_off000116e4.bin
6a24c2f7163ea77597b11322bdad20e27845e9a779401d345a551fe75739b6d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E4 11196 bytes