Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02e9849ef69bdc8…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 07:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 462819d332a9cc3dd7e9d26480783fae SHA-1: ee157b6877aa6ff0128d14d1160810aafd379c1c SHA-256: d02e9849ef69bdc8c3c6cbd625c77734d17d1ada9901acfecdb3a8b3bf1a488f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDFs. One of the primary external URLs, 'https://jottigo.ru/aws?utm_term=punctuation+practice+worksheets+with+answers', is presented in the document body, suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://jottigo.ru/aws?utm_term=punctuation+practice+worksheets+with+answers PDF link annotation
    • https://cdn.sqhk.co/vasegodesazu/hMxGibi/digifabepakexuxajuzomes.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/4222415.pdfIn PDF document text
    • https://wumaluruporemad.weebly.com/uploads/1/3/0/9/130969386/narenafova-pizefexure-bapowugiteba.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/igNKthg/zombieville_usa_2_pc.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/xibaravonep.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/hbjehgw/94186512225.pdfIn PDF document text
    • https://sofofiwolasaxu.weebly.com/uploads/1/3/1/8/131856039/b93efc5f.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/wowaligexun-wuwabifo-kejixepema-porase.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/levovod/lagawibosawikojodugepi.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/21428015873.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/the_accountant_movie_dual_audio_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/armoury_crate_asus.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/business_announcement_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/answers_for_math_hw.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_off0000dc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC73 5148 bytes
SHA-256: 4583c4bb9a98d2047a9f193bac28270606206787908177d195f9bd013bb6d5b5
font_01_sfnt_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 10796 bytes
SHA-256: 742ab8e16432c2b08ef62ecf79484afc0f6ff3e153625a98a1e49720f23f389b

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