Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1c068f8cce1b38…

MALICIOUS

PDF

89.0 KB Created: 2021-07-08 10:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d8420784936ac955cb46b595861ba05 SHA-1: 7afce79f75bc4d0249e1ed4f36b224216000cba6 SHA-256: dc1c068f8cce1b38d2f56026459fe45f27e8b428accfa82b69d27dda4c15c270
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The presence of a 'download button' lure and instructions for a password-protected archive strongly suggest the document is designed to trick the user into downloading and decrypting a malicious file. Multiple URLs point to compromised CMS uploads and link farms, likely hosting the secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/uvk155ukffdoqdc1ciigcij1p5/xizoma.pdf
    • http://nuraski.pl/wsg/userfiles/zabogojakemakikakorivul.pdf
    • https://guclupin.com/calisma2/files/uploads/3092640153.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/316cfb71c4794df346bb33cc90d48f97/linatajexojebu.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d11c404001665416d5c3f4317a1806ff/96108955046.pdf
    • https://pendekaremas.com/contents//files/babuweduzepupajuku.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6e3e259b98dbe113868c74bf9b7e836a/22925102868.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tgc2smp9teakn7279cfacu4h7i/dowotenesujilu.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609836f877a8d---ravubenomafoxinuwuwoseles.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fiob8t24suugi5p01v9jrc9pkm/milogifinawezi.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5c8543e9fe80adf2474ef0de2df41f7/xoluranezokowudoxofuriba.pdf
    • http://historia-bfured.hu/userfiles/file/16319589194.pdf
    • http://spreewaldatelier.de/img/editor/file/40889432955.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/89631386368.pdf
    • https://alshaabcoop.com/userfiles/file/97560975014.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160844bc048fe5---54157860184.pdf
    • http://shqinze.net/admin/upimg/file///26074693800.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/620a76b141418996dbadaed2fafc647b/9784164389.pdf
    • http://alemotta.com/resources/original/file/49551726631.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/e7fb2c05c66e666046ff5e90557f565e/sokekasuridakejaja.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/c755896e169bc752959ffa446d2734ea/72416565634.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e455e5124106747883d7c3d9973f1776/wevapez.pdf
    • http://electrogalicia.com/electrogalicia/recursos/archivos/31643700195.pdf
    • http://imhkayseri.com/resimler/files/27319663465.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+on+ppsspp
    • 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_off0000fa57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 16792 bytes
font_01_sfnt_off00011269.bin
4b44e810f62c6d47cb0668dbd3727d6839cca6e8c2187587b4948669797c7510
pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 17560 bytes
font_02_sfnt_off00014077.bin
94469850220b5ea0f4368ba5ca8c9c2bc4caca776c1947f4d53f19375e96b6d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14077 10048 bytes