Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e75232d044202e…

MALICIOUS

PDF

74.7 KB Created: 2021-09-13 16:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af6a0a4be421a67ecaa65b2fc11d77c4 SHA-1: 535fa9df12a50f49a6491815020f9e1ce79046d0 SHA-256: 96e75232d044202eb18028ff391fa39154a3916c7ebb977c5da2d15d23b58e85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm or redirection mechanism to deliver malicious content. The PDF structure and embedded content are consistent with attempts to disguise malicious links as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mai-avto.ru/upload_files/file/xonasilodoneriti.pdf In PDF document text
    • https://styliststudios.com/imagesTE/file/52253174670.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/fakejusapem.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/36987140635.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/dugowaro.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/84494607363.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7204b9784---venimapadijubufam.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/bufelowomo.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/wemezarijukepowufu.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210912062509_vvap90.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/84933289989.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/25234711100.pdfIn PDF document text
    • http://effektfilm.de/files/file/30920430701.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/99497254774.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/waviw.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/lumezimuninujak.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210903043730.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161301cc88a7ec---kixobogolumojil.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/barekexi.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/9118565509.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/7308623557.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/putidosukup.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/823314839.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/mulugo.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/mepiluta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=bully+anniversary+download+for+androidPDF 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_off0000c0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F8 17124 bytes
SHA-256: 1873063f1ac4d897f5037cb8cbc1b39abe6750fd088b0f4666053d17e2371c26
font_01_sfnt_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 10668 bytes
SHA-256: c2353b4f1d798f69571081f5926b7dfe09579d14c6bac36e300f1fc7a1007bdb
font_02_sfnt_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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