Malicious PDF — malware analysis report

Static analysis result for SHA-256 22387b29965a082c…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 05:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c56f9eaed2047e42db5450c0b097539d SHA-1: 01214c859648e98b7f06d2f39a9fe9404a293e5e SHA-256: 22387b29965a082c55d0be3ea4999937aba17d3598fcc923214aef31d6d41e50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate an attempt to lure users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0dc10aacd---92436608032.pdf In PDF document text
    • http://indianspringhomes.net/userfiles/files/pusumaxu.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/66800074580.pdfIn PDF document text
    • https://haidangpc.com/contents/files/xesusugumokazadox.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/ratifugilakufefam.pdfIn PDF document text
    • http://cpils.com/userfiles/file/80678905132.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/26583936562.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/89753589982.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/valitupati.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613966cbc83b6---batipigawakig.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/63561222529.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/nijiti.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/62638659794.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/61244150941.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/jijesiv.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/firiwedivasekiv.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210913_5EA1AEC2D60BA72B.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/fonokokonajuju.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909170416.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/50804196707.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/23341893328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hack+onlyfans+freePDF 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_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 17288 bytes
SHA-256: 93488560cd757800c8d5d67f80cd8a1ef5874ae7bc8bb277229b14a2867e70d9
font_01_sfnt_off00010cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 10336 bytes
SHA-256: 398ce7aa52c8d821e429dd0f0d8ab6c03ee51ae6c42aee3b0170d0e7a1007424
font_02_sfnt_off0001244a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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