Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07289679f25e705…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 01:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3312e3c42489b75c34d3c79f47fdc6d SHA-1: 6c1ac7cb8dc2e3eb1d20003c9643e7b3c1641fb8 SHA-256: b07289679f25e70529795089bdc70bb698a2b4c0ebfb9b24f540ca6702a1f43a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and a raw IP address further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://yongqingtech.com/d/files/45086718693.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8846b9a3fb---rojibaloz.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/cfcf70b7a01a8c0a67997e96e16654b4/65523583155.pdf
    • https://sardavetri.it/userfiles/file/depijige.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe7886222e---tuxabopuzogesofefip.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/c87ca20cfd95764643386c9c576afa48/robunitudis.pdf
    • http://etenindex.nl/images/uploads/36788441652.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609095cdeaf71---kurijizenigojibesupota.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f9c34edf0---wirir.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/867c821498ee3b48e7cc14cbcb307ed0/73982654490.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784b1123fbc---posetilusuwegamarufajon.pdf
    • http://157.230.241.115/image/upload/File/kubafapiv.pdf
    • http://tpdw.pl/userfiles/file/jarafawobifenarum.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b1723fde5---55532701627.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071a9320d08b---mabedewafafutivabunawabi.pdf
    • http://contextuae.com/resimler/files/36568242848.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e947b36a7---sefuzajikufimudo.pdf
    • http://tc-antey.ru/uploads/files/87969978896.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jmlimu7ieq41m0o9hvo5obdlv0/47103694789.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/305cbf8de71be1e1e5109c0a7c35d2b1/74563114900.pdf
    • http://sp3siemianowice.pl/userFiles/files/penozabafixusive.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c56b02ba41e---9040799971.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=trampolines+reading+comprehension+answer+key
    • 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_off0000e8c0.bin
892a76749f1fe009170a2ae96c98ae09e833ea9109de6203873b7f1c867ef11d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 16800 bytes
font_01_sfnt_off000113f0.bin
b78968f7aee488996bd06fa26a040396ffb3b979a39bed58a9bb01cabc7be3cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x113F0 11120 bytes
font_02_sfnt_off00012d86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D86 16792 bytes