Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14f2a80410b3765…

MALICIOUS

PDF

80.0 KB Created: 2021-07-13 22:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 631446f252f222b58597577aff284eeb SHA-1: 3eaacdbfbb0d181cb1598e4eb98395f8a57dc26c SHA-256: c14f2a80410b376550a9fd0b74ef0cd1ec467ef82905aa000ed5621e35eb47dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous compromised websites, likely intended to host malicious content or facilitate phishing. The PDF structure and embedded links suggest an attempt to distribute malware or redirect users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608536ded8e21---buneviluguzifajolesipaxo.pdf
    • http://ogledalata.bg/uploads/pages/files/84195308998.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e8c057277120c9f0eb625c6db1c37f44/14028944961.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9b108f41cbd9e7c38d21df6659704e2a/19779764992.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aacc65ee2---3225730614.pdf
    • https://arhstroi.by/uploads/files/xesovulifu.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/duji8edkh8trqu0jnnuge7fv12/fakol.pdf
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/rapunekimezusenowuw.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a94c4a8088d---rikirigujone.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f427d793cf---80904279150.pdf
    • https://avela.md/userfiles/file/544107703.pdf
    • http://sacoorhealth.pt/site/upload/file/gejebusawuvagozerexoni.pdf
    • https://prtl.pl/userfiles/file/83757698432.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/kefilalokapepadiguxagor.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01e6dcf038---46061720978.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160af65e2aa8d2---bikezuwepubomupelone.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/8a1c440e97715e95cee0d32e325895cc/duredad.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a38b12643---xemugekubejoforasosoni.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/e7385f16153c4db88be509b646d499ec/55825243799.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/r4h4kc8h4q4bbagd5uqcm5vc10/47881652204.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609edd8ba0102---94547082254.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f04f23ef9---71583090325.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mini+pikelets+with+smoked+salmon
    • 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_off0000d5a8.bin
8705ad0ee881b4fc86e8baba9320929f6a5164e148e5c2f389a9a00560ac267c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 10728 bytes
font_01_sfnt_off0000ee2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 16792 bytes
font_02_sfnt_off0001063d.bin
3171aba83d5bfd8c7c88e7635132ee43c422c18fc6a4c3321d40f4b5ae26670e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 17056 bytes