Malicious PDF — malware analysis report

Static analysis result for SHA-256 d114d5240f94a017…

MALICIOUS

PDF

160.2 KB Created: 2021-06-30 23:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d54dea3462f680e31874744155bf0286 SHA-1: 51e8d22e6ab5445a053213e4d302b4688782a2b6 SHA-256: d114d5240f94a017d935f3ac2c489f1a75e2f194b1a58590a8d08b363da8e357
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, identified by heuristics as a link farm on disposable hosting. ClamAV and an ML classifier also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ec4d974a---22021873644.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/5f08e24b823c94f080feb3b169623b5f/32102806086.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d48974484b8---vepizagexagaxefebugumedub.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d3677acb---xenok.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f2950b5b1a5836a5f1042dd1562d4320/39778280876.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/girowakesunafawejujot.pdf
    • http://anpo.vn/upload/files/72152326713.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13f5844607---kasuriliwufep.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d20a19b4b47---vadetazorodopadunobeb.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608da6479cd13---naposuvuwezibiwuxepa.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/m4nnu23jlsbpvjjl659q1k7eh7/dubaxu.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1304d341c69db9dbf1a32b6603d77de5/1801425565.pdf
    • https://jagominum.com/contents//files/15074691553.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c20cf21077707a916c0eb082cf9e8d80/76498326140.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b64ac4a19e9---54592866340.pdf
    • https://lecachet.fr/docs/files/xizisejugutaredif.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8888eb3438---7744156725.pdf
    • http://pwmtqatar.net/userfiles/file/nuwexararuwimomeve.pdf
    • https://associazionedynamica.it/uploads/file/85647593362.pdf
    • https://maxflowfans.com/userfiles/file/funosa.pdf
    • https://dm288.rs/slicice/file/87480290133.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b56a9a5f8---62832121433.pdf
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/xitijiwetobutuguvozu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=to+be+detained
    • 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_off00021886.bin
c2aacdbc19efb2a74e2ad0360c759d183d63138f0483c398b4cdf2004f2654fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x21886 17064 bytes
font_01_sfnt_off00024507.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x24507 16792 bytes
font_02_sfnt_off00025d1e.bin
ecbda9a103f7d677bdd77a3bb0d8139f8dd3173c410c26dfb7caa94972f484a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x25D1E 10028 bytes