Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cc7e37dbcafb37…

MALICIOUS

PDF

93.4 KB Created: 2021-08-13 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 13b3d30af40ffcd692ad1800cedb79de SHA-1: 556ba7a096af301b00624efd453075e6336580ef SHA-256: 14cc7e37dbcafb37e0d1ec46e619a9f0c63692d08502d5ada8da1a5e385aee89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs hosted on compromised websites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://giorgimpianti.com/userfiles/file/nasogokisufinuzikeju.pdf In PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1507b5727fddf6db3c94136fd12bcf4d/74739298760.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c476f652db8---kewipefedinuza.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c35bf1c3093fbed258018b6271619a4a/86277141747.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/zutuzefamirix.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ecb0a24d58f1f5c4a557ac117e1d712e/xufof.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085000d4bee9---84759792645.pdfIn PDF document text
    • http://healthywithhart.com/res/file/susotor.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210724_3998DBA74F9A5BC3.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/fozibemigapegejaxo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990abdf1d78---sutanovulukusevok.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4a230b19b8d1f1a0d91b1112a2f3de36/74958401600.pdfIn PDF document text
    • http://mmcaana.com/clients/29274/File/tebojuvuwimigusetikigi.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160924d4ca5824---leveletevafadiz.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866bd5a139e---39056832969.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/xudonodizemavemifevisaxa.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/10879958161.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/jozujapexowagawubi.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/7lssa3iri58h3s9kcm6lbrp059/90680077404.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa//files/paxisokuxaletisil.pdfIn PDF document text
    • http://amdind.com/userfiles/file/37451326936.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/eba62c2696a35b57d2dcbbad0a4a7cca/gozirebotelopexelov.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210606032413830692lxe9hw.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/f60bc892079bea08ac450dc7bbdfa570/86484635940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=er%C3%B6rterung+schreiben+englisch+zeitformPDF link annotation
    • 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_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 11120 bytes
SHA-256: eeef994b9acc25222106be16575d8a81ff37a6fc7855e56b41f25c6087fdcb40
font_01_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 18436 bytes
SHA-256: 257a01630310f31100cb615edc0b4d07bb698ff813afb3010ea8c1a4720082b1
font_02_sfnt_off00014d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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