Malicious PDF — malware analysis report

Static analysis result for SHA-256 a746982b976b683b…

MALICIOUS

PDF

84.8 KB Created: 2021-07-12 16:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94190e559d92caa7bb5d911d5b37d446 SHA-1: 47304486e1f100fd638ee93d20735439cb7756e9 SHA-256: a746982b976b683bdf6b4221b68b7cda5897329090cadb7a7cfd7029a0b331c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to websites hosted on compromised Content Management System (CMS) upload directories. These links are designed to redirect users to potentially malicious content, exploiting the trust associated with legitimate-looking URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=typhoid+booster+price
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/t67bm6ichht5tfm3in3o934le2/kowotupude.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/a40d30f08222643f31e232ba594de4d5/19879832080.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/roxasexodokefamad.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d0d124fe7---rikudij.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d67aaa4aab---6507282111.pdf
    • http://3e-recycling.ru/app/webroot/filesfiles/zalejobodonadofa.pdf
    • https://kaptenhoki.info/contents//files/xagivegigebi.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7krh4c04hdj1v3rjm74g7m1rgr/14852751081.pdf
    • http://biosite.ru/images/news/file/devimenusitunam.pdf
    • http://garmagostaran.com/Upload/file/xesikuxewiwe.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0923e3431---wavoredarumavizojete.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/mosixupepowi.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8f06306c---jegatetoxulijik.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1c3a7f5ca---47173408768.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba81515bb2---jovogiwuvesosopufejatu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf76166b2c---89582171594.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608292bb2295b---mufaji.pdf
    • http://amon-syotengai.com/userfiles/file/60829344667.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7a83befbc50b6f965b67686ef829d1a9/91548505573.pdf
    • http://akicgiyim.com/userfiles/file/jofulazositekel.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e43ac582e---jedidimumozofu.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/gm6sugtjfnijra32antm78h4e3/82635826335.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5327a9d0d---letexanovuzefimuzukusexe.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_off0000e7ab.bin
f649cb4d6f099ec2dc6bf14a986f6996ce463ba5e129a9df5f3168f727ba9612		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 17804 bytes
font_01_sfnt_off00011663.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11663 16792 bytes
font_02_sfnt_off00012e7a.bin
f9ae1546678a2b0613e8986d202dd1e59b9aa346592a8094b17f1f039c1e9bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7A 10516 bytes

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