Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5168ea7b0c39594…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 02:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd447fe7e5086d6c5bfb08c492453f7c SHA-1: 7c867cbb1c09fbad694f6263e2b5efee28588dd0 SHA-256: e5168ea7b0c3959465b8bea1039a54b5688625de3396efba88fa358f762fd97b
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=clammy+feet+meaning
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/f566409a625651dba082d7974eb0cdad/75337957799.pdf
    • https://discovercefalu.it/_data/images/file/lilenejuw.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf2520f3d---darekebifuw.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb8ae5bb0e---64310629670.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e0563c5ccd53835b4d74d5db512a1208/55169786605.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/5pl3q43ecs6in6jir3r3bitao0/soxodelovololunabesej.pdf
    • http://simonhoirup.dk/userfiles/file/9946200070.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/7602332150.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8ae0ff9e2844a169b4d4d828e882ce27/9274923825.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160871049a63a0---joruxelosibufowoxitasin.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5ab20bc1d---pomifaj.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/ff0151fe8983485502240e32623ec378/89659859269.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/m5gpklm6rnt8468t5pm7no6ab6/xawanevagitigutak.pdf
    • http://afghansolar.com/userfiles/file/jubak.pdf
    • https://veterinarycarefoundation.org/userfiles/file/38163163178.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/38f76872ee19599c36f0aa372decd5a3/vakivekurawi.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08e4c144aa---25770015345.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guvene.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/3506d11qbfqibtolso1nvgoi66/jinunixipamezamunulab.pdf
    • http://autoscuolecasetta.it/userfiles/files/maxapemisip.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_off0000ef44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 16792 bytes
font_01_sfnt_off0001075b.bin
1f854d308be85b73962e1d014dfb33d349bdd2b9669ac8f6067e03435e6c3228
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 10312 bytes
font_02_sfnt_off00011e90.bin
7dcc3baf424dcf17b12aa3e347ac919f6a1e6ac9eeb27ff2edf567ccea4b33fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E90 17256 bytes