Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b2837cf25f4e9a…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 08:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 070ff50519ca6cb75ab5b303c6b8ade1 SHA-1: 11e9c1b10eedf2c153f16257bb22c06eb15e2f18 SHA-256: d2b2837cf25f4e9a663b56118519ec1b8287d07557e16e8bff95f5805d51719b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious or unknown domains. The presence of multiple disposable links and a redirector further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/99a3659903d8ab2ba57f5bcd0ef67364/bebaxufo.pdf In PDF document text
    • http://j1medical.com/uploaded/file/xibowanofoxada.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109070857469518.pdfIn PDF document text
    • http://furniture83.com/upload/files/70863711454.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/suvojidobutulamakisu.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/walubine.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/56526750480.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nanejaniliwakavape.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/1000154906.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/pukigaposeru.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/sivolakanuba.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/24989998436.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/venebezobinofamawepuj.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/52128019867.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/jurijoreru.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/5883691539.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/50931516283.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390e5a5d3a6---27382342894.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/61715927101.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210901_EF38E1CB83B9DF1C.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/10491676058.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/fozegiwedujezanutux.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/48820318664.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/vijetamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=psplay+unlimited+ps+remote+play+apk+downloadPDF 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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10944 bytes
SHA-256: d9ce5648718f9f229fb7cb00f891769f240ce27f52c5935168ff808b345e3338
font_02_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 17684 bytes
SHA-256: 5c9748030c12280b18076550441169071cb5afef505d948f14b621c6ac7d988c