Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabdced199140902…

MALICIOUS

PDF

85.7 KB Created: 2021-09-06 04:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c18adddb4fa9c8d28130b88316355f5e SHA-1: 32fda82234ae90b1024f3c064acde1f2c330aa3e SHA-256: dabdced199140902477e3988f1ceb605fe5f0b04fc00ec1d5df3a9e2a9505f7e
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://smidgel.ru/uplcv?utm_term=out+of+africa+karen+blixen+pdf+free+download
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/d28e283179457689d30c72e023fe698b/dejelopepekilatajipevak.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba9c8955f1---29772710252.pdf
    • http://allg-gyn.ch/userfiles/file/12383483167.pdf
    • http://fertilityupdates.com/userfiles/files/zolemigaxonogizegewegef.pdf
    • http://bentleyplemtech.ru/userfiles/file/29654346086.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c036d9a0f96---vijujegijawepibegukudeba.pdf
    • http://moto-bike.pl/userfiles/file/41756748271.pdf
    • http://universalestetic.com/userfiles/file/vuwobubobe.pdf
    • http://kadh.kr/bobod/upload/file/jofetovogifuma.pdf
    • https://varbackaforskola.se/ckfinder/userfiles/files/jukasupimikepile.pdf
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/53368322977.pdf
    • https://gbagencement.fr/uploads/file/75753314954.pdf
    • http://bipaf.org/2009_home/upload/editor/file/jovikapulezuzerekewepe.pdf
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1079576000.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128223490834---todododebakovilebu.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/1c4060610fa04a6c901c6cfd2bb85220/xepilaxawewajaf.pdf
    • http://www.koeru.eu/failid/file/nomuwowabofaduna.pdf
    • http://ezibra.pl/upload//file/xixixanizejowas.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4969636739---40786132801.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613502073034c---fakedowemoxar.pdf
    • https://idealist.ro/userfiles/file/kiwuwonifitikosajolox.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/4bc78ef9e2f2b369f39597d0bf06053e/jamoveputenigitanebur.pdf
    • 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_off0000e4f6.bin
852ceae53a226a346789533a6fb249c789c070f7c7df9a67dfa5fcaa338fd55e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 19360 bytes
font_01_sfnt_off000117a2.bin
1f2d8a27652cc3c1e7ec71a2ff1c0f6db54358a7ff125b0aea267e3d8f57b3b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 10992 bytes
font_02_sfnt_off00013120.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13120 16792 bytes