Malicious PDF — malware analysis report

Static analysis result for SHA-256 af776a1ae4b19326…

MALICIOUS

PDF

82.6 KB Created: 2021-07-03 22:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0ff424628de78ae5f0b3fa5afaf18697 SHA-1: 59849c352dde37a77f747010ee53218e1fa46e0a SHA-256: af776a1ae4b19326b078c05177841d50ef10aaebcc120ca1ac72d7f931211a19
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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=oh+the+blood+of+jesus+it+washes+white+as+snow PDF link annotation
    • http://daisytalavera.com/userfiles/files/vujupipegu.pdfIn PDF document text
    • https://bliznacite.com/files/6530069059.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa57a55fe---20349919028.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/d6ecdd434ba3337481f75e36d99b9333/xenuwamadoluvirabesesipe.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160acc0bb4f969---nekoxowuguwiwibubi.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/89123330312.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/354815762923d6937df9af9ffa359d00/72492693169.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/65484402246.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a07d5703dc0---86789785506.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/fufiravokejivadibur.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/fifasuvoso.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3350f337df---50325168929.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/zumiridalanuzusu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/f6ff17863186d5510f535b2557bf088e/72002617667.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/35111582915.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0088507d---85260758529.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/eip3ufgj3lgdagfssk9fvrisf2/28267725612.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/fuzodolobawu.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/2961778794ad60a9434c9cf58bd2d442/60900719570.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef313e5897---42864642631.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-11/20210511230823755464.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/20055327382.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/k1tlo49igssleftlo2jo6ilj17/95923134710.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/qak784qcfvcuq05ileqhtkqnn5/18865463746.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 17312 bytes
SHA-256: c9d1b75419a8ba6404b792a8026f1c4783d84317b9cf12d7d17048101963e029
font_02_sfnt_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 10832 bytes
SHA-256: acec35bc473e22a9777735e4b2cf33999ab38d9e35b5d9638a26dc640b3d130e

Open this report in the interactive analyzer, or submit your own file for analysis.