Malicious PDF — malware analysis report

Static analysis result for SHA-256 0099ffa54319541e…

MALICIOUS

PDF

69.4 KB Created: 2021-03-02 16:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7b4a2167675bf635f93527555b32ac6e SHA-1: a62a17cc733a8acfc0deaa77c0a90f5f5efdfe80 SHA-256: 0099ffa54319541e33a8b4fa912ad123325799f83866da0bf236e1038069ee4c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign-looking documents but one specific URL, 'https://resalured.ru/strik?utm_term=beats+solo+2+wireless+rose+gold+special+edition', is flagged as suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution via the suspicious URL. No scripts were extracted, but the PDF structure itself is used to host a link farm.

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 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://resalured.ru/strik?utm_term=beats+solo+2+wireless+rose+gold+special+edition PDF link annotation
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/6782186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_600dc54daeeb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5fe1cdf687493.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/hc3jfjd/magic_tiles_3_songs_download.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/3647415.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/7ie55jg/tanks_in_ww1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5fe3fe3f328e0.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/egcifcM/j2me_loader_apk_uptodown.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/5210712.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/communist_manifesto_definition_world_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_6005b2f689a68.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/kisagoz/how_long_do_stray_cats_live_on_average.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/audit_report_format_2018-_19_icai.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/1995_mercruiser_3.0_lx_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/85616152943.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/biodata_format_for_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/cathedral_ceiling_recessed_lighting_guide.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_off0000d230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD230 5516 bytes
SHA-256: 439761c5cca01f78d45608c5fc1f558d9040a1f079a06c9d1f8a21bfc9c8f81b
font_01_sfnt_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 10428 bytes
SHA-256: ee8a5102a572e5a355d35f27aa4746905c410c45d100b3a3db88128f014c7269

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