Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bad7f222ae013ad…

MALICIOUS

PDF

78.2 KB Created: 2021-09-16 08:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b5244afb42fd7e49167f0a7e1333802d SHA-1: d2401950055495223b65abf48260d73be3426d95 SHA-256: 1bad7f222ae013ad0b924e2011d2213c1bf6f5a048020a82789be3d4da72b4c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/uplcv?utm_term=use+mobile+as+a+webcam PDF link annotation
    • https://vas-vill.hu/userfiles/file/togerabilokara.pdfIn PDF document text
    • https://fototipia.hu/files/files/nirijerob.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/gikisodi.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/19108175401.pdfIn PDF document text
    • http://lecostationery.com/files/file/vomenedasititawi.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/54882829905.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/64661911120.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/59908699764.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/35273296811.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/lisazelukipemujunurapotek.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/rixomafanosib.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/11871123970.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/71914074957.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/pumedujofasenosabubebe.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/8701855622.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///45971201142.pdfIn PDF document text
    • http://bresky.cz/res/file/zabogu.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/44375382739.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/takutemaxuzasinerekaxilux.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/kipiwizojavixulaxoporunu.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/merov.pdfIn PDF document text
    • http://djpress.pl/Image/files/dagewasogijexime.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97B 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0
font_01_sfnt_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 16628 bytes
SHA-256: d5e0d0c523aa3cd704c00744e55b26d78963204ef20510ba2a1c6a5786f1177a
font_02_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10320 bytes
SHA-256: 8b3112dc4e257d794ae7a69b47e32af2974576914236648fdc3310392ccc6c80
font_03_sfnt_off00011342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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