Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a431902f4446c5…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 07:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 65b8bd5e7503dca627a0ca630caa4cc6 SHA-1: 879d26bc399580ae3e3912b3656362eaa21abb18 SHA-256: 60a431902f4446c5f710f4bdedb9e3c87c97c33a5d4b51b01c10df466bac2e97
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm with a high number of external URIs, many hosted on potentially disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://archism.ru/uplcv?utm_term=safe+mode+on+android+galaxy PDF link annotation
    • http://eyupsifalibitkiler.com/resimler/files/sevevutepinelawirizafure.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/bifapomepewaviripe.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/xitefupewi.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/zofogojojomagokogoxa.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/23795067973.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/pevotudexiloka.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/nokakabuzajapodurufopapu.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/21869764161.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/juvojarebesojolex.pdfIn PDF document text
    • http://aa-nusd.jp/nuteroxoxin.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/20353261192.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/jenazemazisiv.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/kavutelasav.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/nataxulezubojapasuribuja.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/zobolemuzakimibi.pdfIn PDF document text
    • https://titishop.co/upload/files/97866810722.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bh5ah42jpt97ojc7dfepfouc72/40045712153.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/jemedewedarutitokata.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d97e3482a0---zozesigamewurubezugefum.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/23366790389.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/26003888972.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/sukag.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_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 20292 bytes
SHA-256: 0c33da9468b5b035221b6527911308032229bfe59fec13afe4bfbe34f3bf5d86
font_01_sfnt_off000103d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D8 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_02_sfnt_off00010c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12479 10724 bytes
SHA-256: 3b71a438107e714c80fd34fa023e911d8c22f145f4959febe52386e658cf00d1

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