Malicious PDF — malware analysis report

Static analysis result for SHA-256 908cd2023277cf24…

MALICIOUS

PDF

77.3 KB Created: 2021-07-31 02:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 202ec080f0841272555b3f3359f19d52 SHA-1: ce48052462f7a8cfbad160d3c781309bb2dacb10 SHA-256: 908cd2023277cf244a5075238d574543c359e29e300b81a650d47ba78b4636ff
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, such as https://infrive.ru/uplcv?utm_term=dheere+dheere+hrithik+roshan+mp3+song+free+download, likely serve as lures for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=dheere+dheere+hrithik+roshan+mp3+song+free+download PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe68bb61c6---12639695029.pdfIn PDF document text
    • https://campermagazine.tv/public/file/wuwinotekemijegos.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/90978199206.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/57293694458.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/pojarapimefifet.pdfIn PDF document text
    • https://attack.lt/images/files/porexosokimigixekavo.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q3jal3g33ifsqieh7ksqals7t3/parodov.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/damapeko.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/megetemujajapubosemug.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/f9d2cb5f32f33ed35db3cfce10f7ac1a/52199030187.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/58802408780.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/m29cvsmjhlr0nphe68nh803vh3/pugagogavuw.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a77d2a7185905575f5164802c2e3bcde/kopinejugegupojazi.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b017cf4b---relepibitukarepar.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/72759fecfcbea881b352ee9f182430a4/37510370991.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/99783071591.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/68123709627.pdfIn PDF document text
    • http://wamer.org/userfiles/file/rilulodusozito.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e095c3f0d653b6f4a9a7d447caa8c2e2/32733169982.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/290bf9531079d0da16682494da7001ea/kutiwopajixi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dd1f27273---95065043660.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/buvadadevirasaruni.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098238071c9d---74993836034.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/9srlj9gt93h3uji9r0fbc8tosc/papexarazodazetur.pdfIn PDF document text
    • http://geotersrl.it/file/wolemufiratepexuladuvu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E9 16744 bytes
SHA-256: 2341eb965bfdf3b3e3801ba76b05a0e5171d96231d1f10e4ff1229b54a776f76
font_01_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 11296 bytes
SHA-256: 25bebce1842fb718f9e2e2dc699e520cfc7d89de7aaf2a191fe90702a35e4ec8
font_02_sfnt_off00010cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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