Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca5750b64b961a7…

MALICIOUS

PDF

87.6 KB Created: 2021-09-01 11:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73fca3c3de824fd1d6a58bdc0577d564 SHA-1: 2e0e71cc67c9e11ee8dcd2720fee623fe87583de SHA-256: 2ca5750b64b961a73a916bec74232191662f53b72ef2faa6334f9122275f5eaa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8baead50ecd2b2a71855818f0d1e8c45/41429061187.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/29d82a90c5bf9bc5740c716d834fdc68/wifoluvewilebidosimene.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4546b6406---kalopawaponad.pdf
    • http://murzilka.biz/images/uploads/file/sezafesowam.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/4o5vtc5p6a935rrp2u0e96m8ra/63860406701.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2473b23c80---rorivalokoxixebu.pdf
    • http://kipia-nn.ru/userfiles/file/vuxuxinesokawesobasuxelis.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4b76a24cc---14943704905.pdf
    • http://angerdress.store/ckfinder/userfiles/files/96323870083.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4592ebaf---96977246785.pdf
    • http://betaempire.com/uploads/userfiles/file/file/finodimalat.pdf
    • http://aklond.com/UploadFilesfile///2021071816383054.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/1cumh8pb9sac37pa5bu5fblhr0/jekaruzivawinalegozo.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074276cd89a8---xuser.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753bcf16688---fafunizezomodavabo.pdf
    • http://seedcambodia.org/htdocs/cljr/data/files/49950776431.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c9eba15b---maxena.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/7pjb4psah34tkpskmcj6o74pue/6863531038.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fbd53bdb---kilijapufedavunuguzijapub.pdf
    • http://se-ty.ru/uploads/userfiles/file/gabalefediwujimojakenofi.pdf
    • http://orhs76reunion.com/clients/30721/File/22465241211.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608421d77d878---95439484238.pdf
    • http://efcosmetic.com/uploadfile/files/7842001755.pdf
    • http://dianacb.cz/userfiles/file/bufizegit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=parables+that+refer+to+the+future+coming+of+the+kingdom
    • 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_off0000ea16.bin
b3057967fdd356abda8d9fe8fc80d251b0a77a5b51352e9719ef90833d541580
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 19768 bytes
font_01_sfnt_off00011e17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 16792 bytes
font_02_sfnt_off0001362e.bin
df9268d85eaed48d5ebc3848099d357e081ebadfae45d30a93ec046510471c5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 11256 bytes