Malicious PDF — malware analysis report

Static analysis result for SHA-256 d941f7c32225f44e…

MALICIOUS

PDF

85.9 KB Created: 2021-08-09 19:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 08007298603de24615e84facb76cbe9c SHA-1: 02fdd1b9c65abe741fc4e19abf322fec811d9e68 SHA-256: d941f7c32225f44ed668a06288c7eab4ade7f69083b848c77784c015f20964c8
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm indicators further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://coretry.ru/uplcv?utm_term=what+are+the+positions+in+the+episcopal+church+mean PDF link annotation
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210725032745.pdfIn PDF document text
    • http://inercial.es/uploads/files/740602395.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/41737771890.pdfIn PDF document text
    • https://granchefpremiumfood.it/file/xulirizapelijakadifaw.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/dm89tr5r64dqlcog58ra0gijf7/nexutimeka.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/68372541875.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6e6cad93---22478484060.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/lenofogibufewepofejobix.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/74315890534.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b35084a46568713d9e2fbc1021a604df/62492524119.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/gozubasa.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/ca6ebce0e9f3a69f012bd318a9846232/keturafixadixemeperowo.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/dibigim.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa773ca908---68879327624.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f118c4aa8dd6829f371a86564404055/20019752130.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/20598646061.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3c3105554016a09fa38f83fb322a6fe0/zebixizisevaka.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160d6aaf946f99---dekoval.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29b6bba67---93994813600.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/15076201822.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/tonanuragowawufegisazum.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609eeaedcd3f6---20306580993.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/komoguwozivatafowinekuka.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_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 16392 bytes
SHA-256: c4242d03281e86556c74dc8b0be7eaf8615e965efd6222097be7922f7785fac3
font_01_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 10732 bytes
SHA-256: 9807bdde03a38e16f82dda68e9a97dc5d5ae2c6827688feafc1648b2ec70abba
font_02_sfnt_off00012f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1