Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e8e203ed6e1ad2…

MALICIOUS

PDF

82.2 KB Created: 2021-02-24 21:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4c0375f657c7e547a23382def4c3f34d SHA-1: 00669d3e745e073b175530a0abc23ce8c0f41596 SHA-256: 13e8e203ed6e1ad23020c68d76c2b1fcc03999bf3f9950a5dfceec47bd9cb83f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are presented as download links for various content, including a "hack tool". The document body, though heavily obfuscated, contains keywords related to hacking tools and the PDF's creation metadata, suggesting a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=downtown+mafia+hack+tool PDF link annotation
    • http://asia.kiwi/dakunifaknzsr.pdfIn PDF document text
    • http://vereffka.xyz/samsung_a70_actualizara_a_android_10ekjg0.pdfIn PDF document text
    • http://gtmedis.com/may_produce_java._lang._nullpointerexception_android_studiolz4vw.pdfIn PDF document text
    • http://varnisvakq.ru/luzusimitariwek9nu5.pdfIn PDF document text
    • http://aov.one/denefewowepuji0tn80.pdfIn PDF document text
    • http://copriyghtconfirmed.com/readings_in_philippine_history_bookdw1lj.pdfIn PDF document text
    • http://fegebekuxew.22web.org/2015_acr_guidelines_for_rheumatoid_arthritis.pdfIn PDF document text
    • http://sis-paypal.com/comma_splice_worksheet_with_answershmo9s.pdfIn PDF document text
    • http://lasleymarkt.ru/wesidejkrd5d.pdfIn PDF document text
    • http://stat-index-co.com/zasale26pf.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/87897164117hwiip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jagogapibibolin.epizy.com/19171390498.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/kad_emule_lista_aggiornata.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/miguel_cervantes_saavedra_biografia.pdfIn PDF document text
    • http://pavitekoruw.rf.gd/bafakosamoral.pdfIn PDF document text
    • http://wiwifiladovov.epizy.com/luvosivikutaparuwi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 4672 bytes
SHA-256: e785b0a2391e8cbc0c935c6e7860de0e5c25e7f6f3e6174da695d9a7d79d7a2b
font_01_sfnt_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 13576 bytes
SHA-256: f998b9756ef3ae52a642f77b53db29beabc9e51f4dcb4e2496db3452788c8895
font_02_sfnt_off00012d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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