Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225439062fef597…

MALICIOUS

PDF

73.5 KB Created: 2021-06-10 16:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 39e8cdbf51f5fd12c7fcdb61e15e1328 SHA-1: 7d3ec6022a2d11e1b56e5bf7c21531bfd661c228 SHA-256: 9225439062fef5977f69b6573d248640207578a5e0ac6311eb6ff29cbf29d804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, likely to host further malicious content or redirect users to phishing sites. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/uplcv?utm_term=production+process+engineer PDF link annotation
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/f4c30f5b463f6a349e104717fd815b36/texip.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607611249a54d---buvenefamivof.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081968dc406d---vazezowarusijusufigejat.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/v5j6c95m7roq3eog8ffb3rkpa6/36482074856.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/95fc6ee8f8f9173d66170beb628a058a/74822062796.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3322e6755---4634143409.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ojf3m0cjtqt4tn7dsgv3s3tlr3/redenolovofalofogevifota.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/74858675569.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/vatupusadi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fv5fc209kqsvpbq4qv7tan1t2b/teludixugij.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609201afc9d4c---novume.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021060912532373499.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/83051858800.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079ef851fb31---41868456238.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/295131dd356668fadb9c838920e086e1/sinodunobumitidepa.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/dab03fa40f905f22d322206a6e9f281b/84701594057.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078e3360d3f8---1880306410.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac8c11155c---34698038461.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094477255d6c---togagorevogidunujadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 5000 bytes
SHA-256: e8a6b7f679a7caa5f0111cd7e87b42225a9c3aa76c083191925699eb6fe02ae7
font_01_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 10964 bytes
SHA-256: 739109ac7b02c2ba19f01b7376c3243c05744ea792b4af68ea0d1a62cad35607

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