Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc48a1530e55453…

MALICIOUS

PDF

90.7 KB Created: 2021-08-02 21:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d6c3e5ca95c4f7b8673300b7205648ef SHA-1: 4fcc37f8ad2be83af9340eb9b51055adc4cc3c35 SHA-256: 5dc48a1530e55453728a573218d2ee9fe0db90bd32a2f498f9e6d442f3e80217
184 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites and a direct link to an IP address, likely serving as a lure to download a secondary payload. The presence of a download button heuristic further supports the phishing and download lure aspect of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=mini+militia+old+version+2017+apk+download+hack PDF link annotation
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/cd9e0134680703c8660f2bae47e1f7f8/75163671588.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/rixodenezodomulijif.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160762b68de349---55060470032.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/nejomojefusirereg.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/kewok.pdfIn PDF document text
    • https://botroul.be/uploads/71449222016.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/94635919785.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/38e2718aaaa9d6edd0e212887e43c8f2/jipekabelimefururibotum.pdfIn PDF document text
    • http://ps173queens.com/clients/10779/File/51852181102.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2591788fd---waborunabilar.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa4b09a3d8---kuwiw.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/7dl6h88r2qcikaijcd67v3531f/kirev.pdfIn PDF document text
    • https://jagamimpi.net/contents//files/binoponorebuxezifu.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/93899751924.pdfIn PDF document text
    • http://lblussana.it/images/file/52597584311.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/662417a7cfd8fa383d2ca59fc9a75089/geduzow.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8793b951635237465b4f345f3e72bb18/43789627854.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608101029bde1---suvetu.pdfPDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/iga2e14b8oromjt27ie9m86d91/19396451233.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/2304994178.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3159eceb5d3272232bb12bdee1fb2dbb/76306453646.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a6f3be828c895467410cd044527e523a/71441520049.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b53bd1e2---191456624.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/gerakejivipen.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751967b12d1---89607996410.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_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 11360 bytes
SHA-256: 5331e6037934df973baec1cd433763e4af6bd2c7599b0fa4827fbc92a3b02d21
font_01_sfnt_off0001156e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156E 17716 bytes
SHA-256: a7efab0ba9ddb25d64fc2b884e668510e110c3ae13a8b5d323ee60059ad9242f
font_02_sfnt_off000143d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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