Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac425da4cffa6370…

MALICIOUS

PDF

104.0 KB Created: 2021-03-25 03:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 57c5fe3865f08618f1864426cfcf672f SHA-1: 551df34429efa63c37b2e1a99cecf3a74402cb11 SHA-256: ac425da4cffa63709aa383c025035f1f1073f0f3ed911b7b37532ae92864a944
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=tony+robbins+unlimited+power+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366676/normal_6042dc13cf242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_604623d448be4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5febed59e4705.pdfIn PDF document text
    • http://zoo-taxi.site/shadowrun_wiki_weaponspg2ic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_605049915346e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421612/normal_5feda4eae77e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_602ec6dde455b.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/fios_tv_remote_wont_work7b20m.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/tafogusegabomu/mopamaponazawubixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eceaa94-dd46-49a0-87b2-eddc696025bd/80618582108.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/bargaining_theory_of_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4d499c-5981-4e44-8bec-921ef04fde22/nancy_drew_2007_full_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5302a9-d52e-42aa-87f7-b882ddb9e5a1/silirefivemilagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1e03ed-8559-4d2e-84ec-76e08cdf8a60/pexinosukumede.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/astronomy_and_cosmology.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_off00015a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6D 5260 bytes
SHA-256: 4b585acaf8f99eeff9b80d670156d8ecc582fc8a062485817508bda56cecc0a3
font_01_sfnt_off00016c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4A 11108 bytes
SHA-256: a55828dd8f976473d3c1737c7f8b02a7adde85e0ce0b507a2625f54fbd246595