Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dcfef48c35d934…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 03:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c21a767341a0fe20fcd71756ad9dcbb SHA-1: 92b1ba787e46de2caa7f76864f974e223f83cf0d SHA-256: 75dcfef48c35d934a2815e735a2aabc07aba6930e847ce6ae97942b54445e74c
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://allytemp.ru/uplcv?utm_term=dcc+making+the+team+season+15+watch+online+free PDF link annotation
    • http://www.gieskestukadoors.nl/ckfinder/files/files/makunepolijib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133710b34600---givedexedoluk.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/63872424794.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/48344106507.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614818b033b97---muriseruzogevumade.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/20903158037.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613117ab2d008---1337459052.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7522ae6fa47f2ee9cab982f3426e6245/wepifenosow.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/gaxidopo.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/sotosaduweza.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/20283178390.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/farimuwipuwunupop.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/94909160772.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210924182033.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/medunasapopomajowib.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/gugogafiles.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/98784601054.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/59974795030.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/37183399703.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/puwafonebexofapoxex.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a098694ff---42671049895.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16146ffdc3405a---nimeforolu.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/junugazekuzorulenevat.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/sifubusubize.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_off0000b2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B8 11148 bytes
SHA-256: 36cb4426e0b5b0dbe129251a48082c3769bf392e29a62fa64840fe6b8d8d15ab
font_01_sfnt_off0000ccbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 14616 bytes
SHA-256: ba3cc62e4c578474ac99aad23a6c6f16b206b8f0a83e9852716293e80ccca1de
font_02_sfnt_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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