Malicious PDF — malware analysis report

Static analysis result for SHA-256 30963ea9f5ad4f48…

MALICIOUS

PDF

83.4 KB Created: 2021-09-14 08:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1d139f9d942b58d3ba9f7e7004978c0c SHA-1: a116cc8929f38df4e4377e8cc8c795a5c85dc91b SHA-256: 30963ea9f5ad4f482ebf6014cc54e74e5033f3669121e8b5767d57751942f1e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam lure. The PDF structure and embedded URLs indicate an attempt to redirect the user to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nomylo.ru/uplcv?utm_term=artificial+intelligence+risks+and+benefits PDF link annotation
    • http://www.tiande-global.com/ckfinder/userfiles/files/beladuwirubebos.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/pobeluvi.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/resafanax.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/25145678721.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/vosalajuronidufewemal.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/982645124.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/27362143230.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/vedelokaw.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/bopaperejadeza.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/lavevasipatafulodulu.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/xifikasisejijex.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/86742850669.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/mosezaralovutemarofap.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/41066359507.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/bc98adb47608846883b9bde4ed18f913/58532244579.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/0da01b2384eecfdc1bf1e681274844ca/vuladipulaxiza.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/kurutekoxid.pdfIn PDF document text
    • https://hoalavender.net/upload/files/15069855565.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/munirisiwawafaw.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/fazoxunovulij.pdfIn PDF document text
    • http://wych123.com/upload/files/19574554703.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/fumuzo.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_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 10744 bytes
SHA-256: 8afd5a92511ebce18afba61856d771ff8a40b2459509a73b0416cd7e33e9a3de
font_01_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7B 18636 bytes
SHA-256: 67c7eb846a1b4c0f06f454a45a529e27f6aef284b4e86344c8ab8a9c1df33681

Open this report in the interactive analyzer, or submit your own file for analysis.