Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02c806e54565494…

MALICIOUS

PDF

90.1 KB Created: 2021-09-24 00:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac2fa822a4bdb0ddf28ae59ce3b81d41 SHA-1: 86020087c75b1aa2dfff25eb6e47f51a697cfd30 SHA-256: c02c806e5456549418ecd612b8566e5ad7b307177bdda93b2d0d00f9fc10e42b
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous heuristics indicate it functions as a link farm, distributing links to compromised WordPress uploads and disposable hosting. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=apps+like+bluff+my+call+for+android PDF link annotation
    • https://krossi.ru/images/content/files/nizovepatajologopig.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/pewagigub.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/74078121200.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/folitotiwuxun.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/90838502397.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/25d334d95f9711c4b5057d5e5d1f0023/33199756326.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/fobep.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210922180646.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wesowava.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/677f8a473ba4124e96292eed975a98c9/ladujaxuma.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/2019290895.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/76928655331.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/nifelokematipimawakil.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/41772763361.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5c2f139839d4957273929792865923ca/58100873091.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/52218487350.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/bulisetubodij.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614ceb1dafd96---584928292.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/34336073620.pdfIn PDF document text
    • http://andreevka.topmebli.com/content/xuploadimages/file/vivuxiwepijenosafibemitug.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/27988600377.pdfIn PDF document text
    • https://xn--q3cceuw0c6ab0d2ii.com/upload_file/files/88616038377.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/wobixo.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/50341375564.pdfIn PDF document text
    • https://www.posluh.hr/ckfinder/userfiles/files/46477951285.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_off0000f756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6D 11112 bytes
SHA-256: 82df8d6367f10917e9d7c7d09dc487f7cbad0967d62dc702e9fb65d9091159a0
font_02_sfnt_off00012925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 18700 bytes
SHA-256: ce48ff48b228479c281145c7183786c50c974ee9e15add012863d59fdabed785

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