Malicious PDF — malware analysis report

Static analysis result for SHA-256 6914674830e758f1…

MALICIOUS

PDF

82.1 KB Created: 2021-07-08 03:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44b6d60c5736da891a447f510e7d8373 SHA-1: be3779f988ec93e1ad9e97bbc8c9b22077fb8b7d SHA-256: 6914674830e758f19b451bc92234e9b5a5b0bf8080075f7b622bc95062f1f3e1
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Numerous heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, with URLs containing UTM parameters suggesting a phishing or tracking purpose. The embedded URLs and the nature of the heuristics strongly suggest this document is intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://queure.ru/uplcv?utm_term=32+degrees+f+in+c
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16095d9b44ed94---19156693180.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ef0dbff13---vakeri.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/93194a87ec7935ee27c2dd3cd2d3eb58/56084688918.pdf
    • https://baxsporthorses.nl/userfiles/file/nodopojikew.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/7120bfb6defc6d6532cffd9899254fea/medolesatexavezumaze.pdf
    • https://aquafilling.com/userfiles/file/79682001589.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b627a4a8---90227332926.pdf
    • http://tano-cable.com/d/files/81980486133.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba77a4cdabe---26023085414.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qqbigl89slrk70nkigp9cvilgh/96571088533.pdf
    • http://architettoangeli.it/userfiles/files/82684903531.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c827233081---derakutabuluxo.pdf
    • http://branonperformance.com/ckfinder/userfiles/files/94632057613.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5e74ac0ee400d9760f44953f6370c0ca/vododi.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a399d2c8e9a---74471491017.pdf
    • http://valeneighbors.com/userimages/2356249437.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/163da1a89a0b3350e35f10def834b0d8/47527912442.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ca8578e2a---81498846702.pdf
    • https://alice-immo.com/userfiles/file/bimofoxajo.pdf
    • https://aawyx.com/sites/default/imageuser/file/89414924658.pdf
    • http://benhvienlaptop.biz/userfiles/file/56603078044.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/d1f4cf872212ff0f761dcd078a6f01c1/15192719593.pdf
    • http://veronikavilla.hu/userfiles/file/86719418092.pdf
    • http://stellarp.com/userfiles/files/laxani.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ba.bin
5997f0c96d62f28adede1116cdb3a0d58c872db86792d6ddbb1ebb64a5dc8993
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BA 16108 bytes
font_01_sfnt_off0000f397.bin
b600d6a97b2917e7dc113c47777fd67c317319f2881e35515c3d227bd53eeac6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 16308 bytes
font_02_sfnt_off000109b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 16792 bytes
font_03_sfnt_off000121cf.bin
39349943e9c06d54e59a1aa54b0e36622cd546ebae5a07f0105cff6d78a4c4cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 10420 bytes