Malicious PDF — malware analysis report

Static analysis result for SHA-256 c184a9f8e993c080…

MALICIOUS

PDF

75.6 KB Created: 2021-09-06 13:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6e1ddeabfe0bfe68a24887bd9bfce944 SHA-1: df7b87d5b0296e1f4b05da46343d7ff3e4084690 SHA-256: c184a9f8e993c080076f8b7bdb2e417f2c7b9186a22c01117d7040304656ca7f
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating an attempt to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://queure.ru/uplcv?utm_term=reading+log+worksheet PDF link annotation
    • https://nonbodepsg.com/uploads/files/xetovufajadojojugat.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/7612265929.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a328dc9bcf---73394179816.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/16504484798.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b85ebef4e---99613770102.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b32cb60e8---27317548772.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/36934419336.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/99835222828.pdfIn PDF document text
    • http://cauthinh.com/luutru/files/zitaferoxa.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/xakidipow.pdfIn PDF document text
    • http://gnox.vn/upload/files/57449382879.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/hjern7rhj28kgcu83e31nt98p7/88146209127.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/b05u5jivi4vevaq5jlqs5pfc67/xasifavupupanejeju.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/19cupe0cocnun5qpftnej572ga/bolinotamisitazituwur.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/8e68c5ef41dd9aefd05608aee561c9c6/temejitivifiziwet.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/zijozapowikewanaraxaju.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/42216210100.pdfIn PDF document text
    • http://tianfonmm.com/d/files/belevonijasa.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16096066b7113e---lokurizunipudufozi.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/47789536858.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bb69295ec5de1c093e3bf2f227741e30/15971898249.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/79474464482.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d0ba4693---79733457481.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_off0000c48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48C 10748 bytes
SHA-256: e8907b5d396c030e366471d5fe232e03b2a6a13deca8df702d549bd24365c5e8
font_01_sfnt_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 17080 bytes
SHA-256: b7f790d01a1fb87bfed357909024c9d7bf0fb323ec3db52ce4e69e6c65899cb0
font_02_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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