Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc0298c9bd8625b…

MALICIOUS

PDF

79.4 KB Created: 2021-02-15 10:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 21b757ef1a18f6cb3f6da240d98d5c08 SHA-1: 8268ffb0498e56dcc36cdbfefe74b196b78e9960 SHA-256: 0cc0298c9bd8625b28c52917abf28b94a875c3c98c220d514d160d226b34030d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to distribute malicious content through a large number of links on potentially compromised or disposable domains. The ML classifier also strongly indicates maliciousness.

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://jacksth.ru/wix?keyword=right+triangle+trigonometry+review+worksheet+answers PDF link annotation
    • https://birifebirox.weebly.com/uploads/1/3/3/9/133999865/wababa.pdfIn PDF document text
    • http://kozlo.space/sinegexe8jbsi.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/nitap-rokedawozigapar-vujadiwipufag.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/jfBhjRh/xesinotiluxifimop.pdfIn PDF document text
    • https://segagewemavovus.weebly.com/uploads/1/3/0/8/130874565/d3e92262.pdfIn PDF document text
    • https://vazaratel.weebly.com/uploads/1/3/4/0/134017227/pukuzumuwogi.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ghjbha0/jitizomodowikizurusim.pdfIn PDF document text
    • http://nigasheff.xyz/gotrax_hoverboard_charging_instructionska6aq.pdfIn PDF document text
    • http://fresh-ita.fun/virus_and_bacteria_structure_differenceqsb06.pdfIn PDF document text
    • http://begemotiks.space/rediveponimikajiradk48ta.pdfIn PDF document text
    • http://tohld.in/vorirv3l6t.pdfIn PDF document text
    • http://kmikaerfs.ru/23337519300971p2.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/nasun_rewigejujadilom.pdfIn PDF document text
    • http://majidadap.22web.org/translation_affine_transform_matlab.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/hgNigie/hot_rod_cast_frank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/vetuzusekuwari.pdfIn PDF document text
    • http://tufubumokagefe.rf.gd/68505800135.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/juxijew.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/code_of_business_conduct_and_ethics_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 5424 bytes
SHA-256: fafbcf5db1dfe1462f3a14864e84a736b90b895e10a1886669fbda8b77fc3abd
font_01_sfnt_off00010d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D12 10288 bytes
SHA-256: 3b2e615ae043389bb62f254975e18a787b9df6976a4a5725ffbb5ea63c9e6245

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