Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea6b36b1927afe5…

MALICIOUS

PDF

90.2 KB Created: 2021-06-28 05:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56373865069173d4e470f59ef02914cd SHA-1: 341aa3b1fa15e17b9d865bfe41a51bb0281bc100 SHA-256: 5ea6b36b1927afe59dbd1d4dd0efc0b7effa18c81cecd656b977a8c330557fc5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple distinct hosts and a high number of links per host points towards a coordinated effort for SEO manipulation or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/eaf3f67a90eb8543801916525d9c0fbd/deresupukivikufuwajisev.pdf
    • https://gikguamerica.com/userfiles/file/befew.pdf
    • http://www.findvoters.com/userfiles/file/32424727712.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f3173d98---39373274255.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1465c9048e101cba05d50f1da4d55a1c/xopapuvofewidemiboro.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98382526d---memoxejepom.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160839c5b6a6ca---gamopozizereluj.pdf
    • http://minutemen-jrotc.com/clients/84940/File/sifakupilip.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37c613cfad---85471950031.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3911658f7d4b76c20a55cea5a0821f82/59009865629.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160724fed80617---mesaloriwaxigugeletuti.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/acq35backnejjej8q21ooagtoa/tizumumilamevofavaxanef.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3e0c01cf3---79143575066.pdf
    • https://autotronics.vn/userfiles/file/gadob.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/3bk3t3dnkds49ih65sq6i4frqp/54103684826.pdf
    • http://statsale.com/data/upload/ck/files/fuxodekabu.pdf
    • http://mynigaoe.com/upload/file/20210601110518.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608af91a0cbeb---radakifoxobafotuvebiju.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/toadde830edpk4cdqsu2ebbqf5/bixuzesifewuluvajitile.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c06a2c8267e---wusoripoxofevujiba.pdf
    • http://keralabiblesociety.com/fck_uploads/file/95330859290.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f326403e---50784390948.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/14e108447123ad623a4d00dce32062ff/jenefemodoneziwupumapoga.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=what+is+a+lucky+pokemon+on+pokemon+go
    • 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_off0000f77c.bin
8d9efac573075d4d488d0eec53375d9c811c7d8a83a78428e781840fe75ac87b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 18412 bytes
font_01_sfnt_off0001280a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 16792 bytes
font_02_sfnt_off00014021.bin
793091413fa9768a3d831767c627bbf8b4a1f3802d9cf651deb9195920eaf362
pdf-font-stream PDF embedded font (sfnt) at offset 0x14021 11020 bytes