Malicious PDF — malware analysis report

Static analysis result for SHA-256 912caaf98d815e34…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 23:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fd7942528bccdc33486a17dcace56db SHA-1: e75f03acaaf1c8d21a6b1a545d7a5588c6161c34 SHA-256: 912caaf98d815e346c5ff4e0e9d8fde92b2be9a7a917b2159752cff114a9eb4d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://vico-domrep.com/ckfinder/userfiles/files/voridew.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be10a71457d---mepumetenizogujetixurej.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/uk3q5ui9bmd44m866silau6tje/79091774893.pdf
    • http://adamlegal.com/userfiles/file/96565438531.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/g10q0bpsgckrjgdqh0squ8j9re/zezoxuxopobofotilekiw.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607898d36ed0a---19306249320.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/830280ac66c06b5b22b1f2b5296dfc0f/82711552411.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a0f5a07d594e0acc53ef9b15f2fcdd5c/juxulenomodafenidipokeju.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb3d99f0b5---91601049400.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608541b64a9c1---87087778220.pdf
    • http://ecogestval.com/userfiles/file/kujipaxumono.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/lelilafezexapa.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0071e7149f---xanumusilisirofoxesejibi.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0af6ce8d---wuremujobatiwanamuvabi.pdf
    • https://cgeminfos.ma/upload/file/tozozawunedabe.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/l5le5j8386jo56q7bgq02qo0qr/bewamuzavoru.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6uhvedukpgrdu9joc8u56n8ibj/luguzipujirosot.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dc611ee9d---77774821471.pdf
    • http://billedbutikken.dk/articlefiles/file/negobagonunabubalaratu.pdf
    • http://hvpeds.com/upload/contents/file/dovinikimuzokofasak.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b6f188cb6337a094463af01fc0659910/fofelinudotegojajoxelalog.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/e953gjoubu3hikulvpb60nmaas/50702317611.pdf
    • http://broorybulldogs.com/clients/33993/File/nopavegolamode.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/62888839755.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/du9kfdrr7osn6ghqmge6he33h4/numutigasuto.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6cf1335e---97540350680.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pdf+reader+free+download+for+android+tablet
    • 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_off0000ecef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 16792 bytes
font_01_sfnt_off00010506.bin
bb90a249b2c0b71ea5a28929fbfa0c2a6e4b22f040a77eaf39cafadec85e3229
pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 10404 bytes
font_02_sfnt_off00011cb3.bin
27605f79506b0e8c6bfa36b0fd23245737da548b35f26a78a5f76918872be8e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB3 16820 bytes