Malicious PDF — malware analysis report

Static analysis result for SHA-256 8587fad5adc2b913…

MALICIOUS

PDF

81.2 KB Created: 2021-01-23 10:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 13771b0d92683a6a7c8dfbb109ae5d1b SHA-1: ea43bc1d85f1b3a20e90e16a1095f0f4512c56b0 SHA-256: 8587fad5adc2b913ccfbceba21eab592b143713840211a8c8917e6d505e6b5a2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links pointing to SEO-optimized PDFs hosted on various disposable domains, suggesting a link farm or redirection scheme. The primary URL includes a 'utm_term' parameter related to 'cargo bunk bed assembly instructions', which likely serves as a lure to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=cargo+bunk+bed+assembly+instructions PDF link annotation
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/6335439.pdfIn PDF document text
    • https://site-1174310.mozfiles.com/files/1174310/cartoon_pictures_for_colouring.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/96268.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/todizetogovexel.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/445804.pdfIn PDF document text
    • https://site-1171584.mozfiles.com/files/1171584/73715156218.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/5161150306.pdfIn PDF document text
    • http://damodudajipofem.22web.org/11524575983.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/gimaletani.pdfIn PDF document text
    • https://site-1171887.mozfiles.com/files/1171887/fovonilelepegidir.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/1470686.pdfIn PDF document text
    • https://lumidenozure.weebly.com/uploads/1/3/5/3/135345408/2760431.pdfIn PDF document text
    • https://site-1168059.mozfiles.com/files/1168059/fasoxomojipusobonajefedav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejovixija.rf.gd/uroboro_sql_formatter_sublime.pdfIn PDF document text
    • http://kedokonox.rf.gd/5657833980.pdfIn PDF document text
    • http://namidonom.epizy.com/windows_10_game_free_softonic.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 5472 bytes
SHA-256: 6dcb33934d095f498239b549ff0fac4ead259223ab301591a4569b1a2580450f
font_01_sfnt_off0001125a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 11088 bytes
SHA-256: 0f5fefb621024511fcdc18cc4c395bc781e89fbfc0f0514a19e84b18f3ef68e6

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