Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8032d1b4a7bb6ef…

MALICIOUS

PDF

85.5 KB Created: 2021-07-04 23:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92abb01cb29a56dee4b541aa8097e534 SHA-1: 57bd05060cf2376d4b87dea64ee4f057601bf3c2 SHA-256: f8032d1b4a7bb6ef50a44219c596bf037f2aac8aa44fe4b982e14e2bd3974b4b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=the+healing+code+pdf+download
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/6tu15biv6rhfbk3hs297tpnesq/dupobunapebebozedaxevapav.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e0f263a3e---44951653351.pdf
    • http://hnsunnyfood.com/d/files/77501685763.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078794817e61---vavusig.pdf
    • https://webmenuplus.com/images/file/gegop.pdf
    • https://mimpishio2.net/contents//files/86579485507.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a41d1607c59---ponokera.pdf
    • http://collegium-connect.nl/ckupload/files/89950066408.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/076892ce6d618e4f9b1f314cfd8feffe/29819887715.pdf
    • http://atek-ent.com/upload/file/guxubetuwekuw.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/51082856849.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/19009146153.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e2492bc79---14911007873.pdf
    • https://sjalikave.hu/pictures/file/kidubas.pdf
    • http://koszyczarek.pl/userfiles/file/pikuvudo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b2a2bffb4---kerafibuwimejobi.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/siwuwutuxir.pdf
    • http://chokmanee.com/userfiles/file/17356577622.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/9591f68cb0d2e13f32e499ee483299bd/welikuredakidebizaguda.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9151de9669---gepapavevoloxex.pdf
    • https://turkuazhost.com/calisma2/files/uploads/ripigezelufatino.pdf
    • http://beijinghuojia.cn/userfiles/file/82285088059.pdf
    • http://2440027.ru/upload/file/garapadapoxoxonijerutajo.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_off0000e88d.bin
1a4d5e3b05e097e475b219916c2b65ecb933b94d392b539bfd22459cf801fbdb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 17920 bytes
font_01_sfnt_off0001172f.bin
b56b95b39189dbf2ec69ebd1be6558c554bd2771e70d2a1f119325b125ffae20
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172F 10584 bytes
font_02_sfnt_off00012f18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F18 16792 bytes