Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ad968a5fd89b1b…

MALICIOUS

PDF

75.5 KB Created: 2021-07-29 09:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b89f6d1a5f9e0f082714bb25081d5f09 SHA-1: 83d076825bd297dd41eb9dc51e2001d209cb0719 SHA-256: d0ad968a5fd89b1b7e78298ed6d1a82eb527ea1dad348bc60dd3ccd180abc00c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. Although no scripts were extracted, the embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/160c9a69b32eeb8b7e929fafd3c14022/39010766226.pdf In PDF document text
    • https://ontech.vn/images/ckeditor/files/sumelojalojidut.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d65d126d8e---64857297076.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/53568786695.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/82623658798.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/sv89bvalmqh4fgk04rtjgrhioq/48777948785.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160799cb38f9c3---nupiduzojavoliju.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/forizasogofolaro.pdfIn PDF document text
    • http://chongros.com/userData/board/file/luwufejiludokokibe.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/15724367559.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/bozis.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/vimemanaxevu.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/7814647072.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a4fcb4c8eb831b5de394d3ec6ac10d84/59298908896.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab10f7accb9---4112549172.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/towumipasiwuzupagagosizi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ce38648dcfca6f10f1958c62ac56f11c/36605728484.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/35749091040.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/409701d41d0774488dbb41cb07de1d20/46450460347.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160712ac4b8774---94041503976.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a716db21ff4---gorobokojixuxukiro.pdfIn PDF document text
    • http://amandamaitland.com/images/file/jukarizeraw.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/buwutaz.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/65862742895.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6a489d9f---93484835431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=asure+id+7+full+crackPDF 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_off0000c696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC696 16120 bytes
SHA-256: 6c32d9428db3a01dcc206aa739a460a1c9e58b3b8c87cd3df215f975da4a22f6
font_01_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 10368 bytes
SHA-256: 224056477187f24896adea9391d8389f53350529de8c70c7cf9ddfb5f650f9e9
font_02_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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