Malicious PDF — malware analysis report

Static analysis result for SHA-256 30666bece059e171…

MALICIOUS

PDF

80.6 KB Created: 2021-09-05 10:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ecb005897e5fe3eedd993d86322daa95 SHA-1: eac952a84b0fa53b21141416c979742e7451a6d6 SHA-256: 30666bece059e1711f321d5013dea5d539d9b3011985a16946956ff0bb3dc7f9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/uplcv?utm_term=los+angeles+abrasion+testing+machine+pdf PDF link annotation
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdf3f65c80---xuzan.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/jirowojonobapum.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3jnu91r5qc6aht80kuuhkaf2u7/gubakenoko.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/kafoxosose.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16126ce7b99d0b---63225942828.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/jalezesozivunuwagavifuvi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fa120201c50---24595094414.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/44981476311.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/683015faedd4e2b8bb7520aee683e4a2/zoratasobadojosuxugamov.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7dc79f51b---64559955647.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a998a17a566---3973806796.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d99558054f---41399612948.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c580083ecdf---76256373434.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/paxizuvepixisobufaxux.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/jojizafesavivevikavuka.pdfIn PDF document text
    • http://cardolf.ro/files/gisofuxasilunubemol.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e22556d659---sugepa.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/us62fu217pb0l2vvmcv0of2dhl/bekewumudet.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/64573285530.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/88781073572.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/pokozebotelinetojofo.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/vogozoto.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/87795928986.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_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 11164 bytes
SHA-256: 580d35ef44863e9a00725ca2dea4ebbe64b60266ad79b239d05da20ccd08e6b0
font_02_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 17308 bytes
SHA-256: 2cbc8dbde2916f299a97f482b3fddc7c7c13b371a8c224366f52834e662d088b

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