Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa80dcc5796b65cf…

MALICIOUS

PDF

68.8 KB Created: 2021-09-24 21:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c1dd2e1ef4dacd3022e8663c827eb20d SHA-1: 58d8ef1f80eb8df9660a2b1296a9974831f24616 SHA-256: fa80dcc5796b65cf89c3315bc1f1d6655d122e635f81c17e7bc7452ad424fa7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Numerous external URLs are embedded within the PDF, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=no+dollar+sign+on+android+keyboard PDF link annotation
    • https://transturist.transturist.com/ckeditor/ckfinder/files/files/rutul.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/80208615166.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/lidikuk.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/24076140862.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/60241860604.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/jiliwimavid.pdfIn PDF document text
    • https://qkon.ca/images/file/5686232106.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/25965786605.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/musowolibuvixomodumi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/r48b00igojjf34ln9nk39fnshk/23141577035.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/11646804075.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/3303128320.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/jivetapufijezerupakenew.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/23613569469.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/6a8e0591f217560f4b1f2ffd3bbeeca6/razukoborijonu.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/64836833521.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/bewogikupepilasigivafixeg.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/wanise.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/bugimosuka.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/81702417282.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/dijetavid.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/vunumibuwofakizitug.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/52432668774.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/rafizubazugeg.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_off0000af09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF09 15180 bytes
SHA-256: 5b18ebf3ba17d1956592744a1379bbb8ebea0b7cdaac0aaf6918115556280e67
font_01_sfnt_off0000d59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 10648 bytes
SHA-256: 546157fbe1565dc369af6cd00190da1b704b6bbf8f340ed22cf308fb0207ab43