Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0804bf6511665f…

MALICIOUS

PDF

65.3 KB Created: 2020-11-22 03:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1131d152a75b5099a0f6f60cc8eadda1 SHA-1: 126786f885cd64f395ca37edde21b6cd60d6c682 SHA-256: fe0804bf6511665f7784b28faad57aae2f249e6bb4b49d62db7452ad7ff68dcc
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, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://traffking.ru/123?utm_term=virtual+ti+84+calculator+online', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffking.ru/123?utm_term=virtual+ti+84+calculator+online
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/maveg.pdf
    • https://livekurot.weebly.com/uploads/1/3/4/4/134443702/3594086.pdf
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/6e4579.pdf
    • https://tivowigelatel.weebly.com/uploads/1/3/4/4/134495783/litoxifulixosotalof.pdf
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdf
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/7367826.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdf
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/4662224.pdf
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/70b56cdefdf9b5.pdf
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/zetedefitawaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dumupa/artist_management_toolkit.pdf
    • https://s3.amazonaws.com/muxozuvalubi/adjektivdeklination_bestimmter_artikel_bungen.pdf
    • https://s3.amazonaws.com/nefagolom/auditing_and_assurance_services_eilifsen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5df.bin
ad92c3f61f86a0c1a9e4278f51f6fc281f5c6ffb1b463799a2c7b7cef6ab4ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DF 4864 bytes
font_01_sfnt_off0000d67d.bin
992f9f3242003cf3dfe3f28dfff33fda67799a4500a14848290ff6aec59db8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 9884 bytes

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