Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e12d00dc131e3a…

MALICIOUS

PDF

111.4 KB Created: 2021-03-03 02:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4431b9a1ee244db32000f66316f1f2d SHA-1: 592a7e2967b758c09b2e2280d04587e06c07ebcf SHA-256: d4e12d00dc131e3a9052ead2d0dac44529cfb8b214a3a2c549f3ab13471dd626
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/award?keyword=what+is+the+goddess+artemis+known+for PDF link annotation
    • https://cdn.sqhk.co/rapovixovuti/bLjcdGL/galaxy_s9_plus_edge_lighting_not_working.pdfIn PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/157227.pdfIn PDF document text
    • http://ribugiwegi.22web.org/plc_program_for_washing_machine.pdfIn PDF document text
    • https://nifixivenugoku.weebly.com/uploads/1/3/1/8/131856212/fe96d906049cef.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/Jgffaml/music_player_app_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/hhhawhd/best_background_video_recorder_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/dyigcC3/83800000738.pdfIn PDF document text
    • https://zirofapenepag.weebly.com/uploads/1/3/4/8/134855920/fikufuma.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/TOZhdhc/superhero_compression_tops_uk.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/wiwamoxamo/73379358561.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/59599054736.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/apple_airport_express_a1264_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/20515759108.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/tableta_rca_voyager_pro_7_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/cap_reporting_breast_cancer.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_off00016ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB2 5460 bytes
SHA-256: 85ea18bc1c2c9115a71db2f7fafd2230a3b7745de1d6ca2cca9b689730350a4d
font_01_sfnt_off00017d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D35 17180 bytes
SHA-256: 68b2093b2b540016ec421c197ca76584f24e5d44d03d6e4285cd3ee1cab2a01c

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