Malicious PDF — malware analysis report

Static analysis result for SHA-256 94266db51e321378…

MALICIOUS

PDF

80.5 KB Created: 2021-06-28 18:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f881ac3bbbe1de1619c85d938460c43 SHA-1: 358bb888dc90112deb06d124da571114954c9f88 SHA-256: 94266db51e321378344bab64a8a998eecfc147f5d6800b87554d5cfdd112a1ba
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=song+jesus+name+above+all+names+lyrics
    • http://goldenbaycruisesagent.com/userfiles/file/vajixomufapisanisife.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/lj7rtmh0pcl2f7a2rtti7cv8d2/pidek.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076403ecc634---fitulunek.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f08c13c3da---vokeveniv.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/209afe4a685b95ea90e5bbdba9abbd5f/wonope.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tcagvftm6qnrvalcjlo2ecpjl1/83106813883.pdf
    • http://rotang.net/userfiles/file/xatodabulujurenum.pdf
    • http://kashima.cc/userfiles/file/60139451801.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/5f19b03fec46f09059f159369f2b1873/zadirixolov.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d90d02ddd4---72958322234.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/d424e910f75dc6241da679316eaa4f12/pefovudi.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd150e54e0---mabulewofudolepirotup.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e576e679---melogeja.pdf
    • http://avision-italia.com/userfiles/files/19085921041.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcb4c9878f---zevefin.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c01823ba3---gefinadazubabugamo.pdf
    • http://ekolojikweb.net/upld/userfiles/file/fugebikemopujo.pdf
    • https://flardochform.se/userfiles/file/webunubagid.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a91d70605---rinepakoremeniwige.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5bd9d8ffffc6d17dba036a70f30616d2/guronolepugiranasagero.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82b7c0e6b---jatizarelinugalox.pdf
    • https://stiff.pl/ckfinder/userfiles/files/1048403038.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_off0000d61a.bin
0f2e1c6f641d2090fb3c8f2fc34dac6b0bd3ede91773fd490417e1b39352f40d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 17124 bytes
font_01_sfnt_off00010281.bin
28bb8d2a68ec749e8efc9a3b706562d6becf954959ac94a998515b7133927c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 11100 bytes
font_02_sfnt_off00011c64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C64 16792 bytes