Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a321171599c812…

MALICIOUS

PDF

97.7 KB Created: 2021-07-01 13:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc61c3842b94a65a2ce1a1c327c32efb SHA-1: 287b6285934ef42543631c1dff5882a7db599e7d SHA-256: 52a321171599c812e6548a1d99cf96be7e9d26b7f6104f8a5c2f1ea6860813fa
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for downloading and executing secondary payloads. The document also hosts numerous links on compromised CMS upload storage, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160847cb6a5326---zorogukode.pdf
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/31375855197.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb6ecb3319---xezimirup.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/u37p7f4vcbsijuj3urc06rctkf/46092029240.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/tanakeligevanixolovujex.pdf
    • http://ajivikafinance.com/userfiles/file/wudemejogobenokufajuw.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/98622478a01a3d79e24b0e8c827f0fe4/70199353947.pdf
    • https://nada70.org/userfiles/file/babutupikafojotes.pdf
    • http://pathtojanna.com/userfiles/files/77575057314.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/99154791593.pdf
    • http://focostrade.com/files/20210620100405.pdf
    • https://nusantarabet4d1.com/contents//files/wiweletabusasu.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/e17d5a791397c322ca423cc473f99831/97091848852.pdf
    • http://nuitsdartistes.eu/images/file/44874467794.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d23894bc1c---36212620088.pdf
    • http://orderkai.com/uploads/files/98343734417.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/21f4ed52775cb817c1feb545d0facaac/dirapitumidanoz.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/04f8219c72a7b5f9f589bce851f14e05/xukisepuwevusolugamoxi.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/1s7i97etbg7s7i99f57pev68h2/77742499471.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2a2k51q9g3rdbt850ktk56ibhd/gapeloxelofafejikowuf.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf294c3e733---japilate.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/56788532372.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/feca35bc2a043c1ed58ef94ce9e1f7b0/286286811.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/164cd9c599912fab79af67e1e6e78f8d/keguw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=es+file+explorer+for+android+tv+apk
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f66e.bin
267d260b4f3c4f08ded579302b0b4b326f06a4a24d6f17199ecacc51f773b869
pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 10736 bytes
font_01_sfnt_off00010f3d.bin
e0970e3825cffda373431e0d6c6b06eb057945170e268d1d6100061314568da5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 19648 bytes
font_02_sfnt_off000140c7.bin
5c6c785476e112a6f75a41f06a02e059cdfb235959dec2f331dec4fc21c5e077
pdf-font-stream PDF embedded font (sfnt) at offset 0x140C7 1732 bytes
font_03_sfnt_off000148fe.bin
c9d310e3f05ceb503418a5299038822c3e71cafa139d12e33d730308607643be
pdf-font-stream PDF embedded font (sfnt) at offset 0x148FE 16220 bytes
font_04_sfnt_off00015e94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E94 16792 bytes