Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08b290302c5ec68…

MALICIOUS

PDF

80.7 KB Created: 2021-09-17 21:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 41f93609418225f0fbf8450b5e782f93 SHA-1: e43b77a61fe7f210dcc9db13a331eb313671dcc1 SHA-256: a08b290302c5ec6817ab4ed18638191c4eb425d425d4b1514fcfd805ae51fddc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or redirection scheme. The PDF structure and embedded URIs point towards an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=hack+pubg+lite+unlimited+bc PDF link annotation
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/72185178266.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/87476075551.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/63675401623.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/21919233001.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/23390495488.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/dokoributotijulu.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/88476592582.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/bunafevekufiwufi.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/romol.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/70144303554.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/gorutobol.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2c05ad480---kepisuraxunineramiriwol.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/55192146165.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/wupuv.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/7780264072.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/75013716112.pdfIn PDF document text
    • http://cudicio.it/images/file/56292063532.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/sesiresewesupagololexufu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141de9ed65f0---pesoboxataxevolize.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/65257254610.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/53842645493.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/lakikalokusoraradisarinu.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/24843011255.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/83901342651.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/23518213220.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_off0000d59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 18340 bytes
SHA-256: 97e30f5b0d3b08d9d542d8005417dbee1ece7e41935c6a2cae916bf3ff0bcff1
font_02_sfnt_off00011d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D34 10792 bytes
SHA-256: fea1b61376c5889c1ba5f92bdf23f4435e37d3d82e2b03b832bff34f06a2079b

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