Malicious PDF — malware analysis report

Static analysis result for SHA-256 3468d28063f4c7fe…

MALICIOUS

PDF

79.3 KB Created: 2021-06-26 12:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17a9e85dbfa5528ab278115fdcabff95 SHA-1: d9f6d9c324d7e6d92851a27d80fa94e67a148056 SHA-256: 3468d28063f4c7fe7584a9a4f29a7916d0f949294e3fc04b1a8c7fcdc973585b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external URLs, many of which point to compromised WordPress installations used for hosting further malicious content. The primary attack pattern involves directing users to these compromised sites, likely to download additional malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071df24f226c---lalutovuwak.pdf In PDF document text
    • http://dfh-consulting.com/userfiles/file/tilitomogudobe.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1a6daff6---tidepi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/794f5db9ca723973511fb7b7a46cba82/pigexedabovegunowig.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/39948245452.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f632e98b9f---lerefikudipavavefi.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/vrc55ndho6ggt3vjmq16m72333/75556272907.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/bce9u5mq191ufoke97knqsj732/92612105931.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91058ad05---fimokafapefolilodoxu.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/7411755893.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/danitilobudinalokeguz.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb7992867d---mujorewivebajusekuna.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/puredajefedi.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/36351530949.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b008b82694e---fabaleragemujuzipi.pdfIn PDF document text
    • http://derma-dts.de/files/file/fezozuwategifus.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e32ddc3dd---zupijetimatidugujevi.pdfIn PDF document text
    • https://faprosid.com/file/tewajetarawuxejomakof.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/dixabawezabemesejajavixu.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/66207337734.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/dejomazekagutozu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acea5a0d176---filefivumutulasubudalo.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/zijuzigop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lucian+mid+masteriesPDF 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_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 19548 bytes
SHA-256: 18c6fb40a4ef0daf0fced60f6007860d4171d3b84628b269a35daf937e7f4e3f
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 10424 bytes
SHA-256: 3213d7b911b2fc539444ea46216f14e6627c714bb412c269c67d979609d59a11
font_02_sfnt_off000116a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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