Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c73903817c42a6f…

MALICIOUS

PDF

84.4 KB Created: 2021-07-09 11:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fabbed550c4da63fa4b6f4af89480dc9 SHA-1: 22f509b13fa3b65845d3d7eb2e06999fdd905fcc SHA-256: 5c73903817c42a6f1d6bf18488a810c5d0fcd52ed518ec76c89eded294572911
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of 'cmd0aqg15vvd5egnk2/fukegetedibirit.pdf' within the document text suggests an attempt to execute commands or download further payloads, aligning with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://chmelo.hu/sites/default/files/file/69415484867.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0bmb6erucmd0aqg15vvd5egnk2/fukegetedibirit.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160825bfba9652---wujate.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/cbip1dvu4n1r2mn52pm8drbj63/10739108302.pdf
    • http://chromowane.com/userfiles/file/26367950614.pdf
    • http://technoculture.cz/admin/upload/file/nixozev.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ca137812e94---31239270004.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b188ed8477---72241791730.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a54539891f5bd69e35ca179584e5dcaa/86856559851.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/r6goi4l5a8hj5u6ldshtpm9da6/16207765676.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d5d9bd91a---pojamararip.pdf
    • http://ouhkpthaa.org/userfiles/44261479907.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/393c6797d258d3599dba999dbe3fab72/rarurutur.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/794cbcf07b2349581f785b4af6641526/wobatinixakowuzisevo.pdf
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/c435f03ddbae4a1e81b69dbb173d2b14/86375472148.pdf
    • http://rauvuonsach.com/images/uploads/files/nemajodadu.pdf
    • http://prime-standard.com/piceditor/file/lipajatofonotupo.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/febc93c3ccd7f1ed036672d73954d4a9/kojifi.pdf
    • http://bjeclinic.com/ckfinder/userfiles/files/wezuviduwokojusilefisemo.pdf
    • http://prestopc.it/upload/file/xoduwojimipilikix.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uoa32umivq6ivsjer763f5atel/58399875113.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba18771c32---botuwofajujeredaxaranomiz.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dd679cb462f---sirobuva.pdf
    • https://desertflying
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=simple+drawing+of+fox
    • 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_off0000e93e.bin
8b2bdfb701a7a458045d38a0f1330c0e28600b42707f2c173ac4fe2659f4992e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 16440 bytes
font_01_sfnt_off000113ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 16792 bytes
font_02_sfnt_off00012be1.bin
b8bdf1f6b0065914ed866a430fdba89534bab7eeb9b850daf6b812a7b7902c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE1 10836 bytes