Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d940fa772042346…

MALICIOUS

PDF

90.8 KB Created: 2021-02-15 00:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 753580870b1c15a857116d59a5ed97cc SHA-1: 1fd13977e5c80dd111b20d6d74d2a9da208b2908 SHA-256: 2d940fa7720423467395f8077fd9e272ee9b329181694d375a67f326dd3e983b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that is highly suspicious and flagged by heuristics. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to "word whizzle answers", likely to trick users into visiting the malicious URL for a phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=out+in+the+country+word+whizzle+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5ff7f304dc906.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/giu8Zjg/chronicles_of_crime_noir_expansion.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/8jjBsuP/20605923627.pdfIn PDF document text
    • http://uuuuull.space/sign_nsfas_agreement_form_2017k6mxu.pdfIn PDF document text
    • http://ouily.xyz/saxofay0s4j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5fea1a7c16eaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387711/normal_5ff15bd324405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378855/normal_600135d832032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_6023789a12090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417139/normal_5ff87e378d3cb.pdfIn PDF document text
    • http://wspring.space/the_thing_infection_board_gameb23g2.pdfIn PDF document text
    • http://adanakebap.org/86870507126ws9x4.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/8XWjawP/cat_simulator_games_on_computer.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://lusiwavi.rf.gd/scottish_heinemann_maths_worksheets.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_off00011b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B63 5180 bytes
SHA-256: 42c436e3274e521b496eb4ff7af378a65bcbea63a00fc7e9f23315c598761ea3
font_01_sfnt_off00012d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D11 10148 bytes
SHA-256: 56e7ba14f9256420a19d570ed498b746ebcf969f7acfc1fcb94c612c0d97f4e6
font_02_sfnt_off00014fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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