Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4e23bc0302fabd…

MALICIOUS

PDF

123.5 KB Created: 2021-01-03 17:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3e808e19887f7cebba95fa81dd5d779b SHA-1: f0283ea5dc98d4bd60bd33a0f881afb87f72be19 SHA-256: 9d4e23bc0302fabd7c79d436dda3b8286df43a68b033e56fe7492ca1d722e4e4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=what%20happened%20to%20bugsy%20siegel In PDF document text
    • https://cdn.sqhk.co/lanumakefu/ihFWVja/xbox_series_x_in_stock_alert.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/tuzepi.pdfIn PDF document text
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/xekunojovagabinave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f91ac289850f.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/ggdjfhg/dufenevupet.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ifgihcz/dovujujorovowikututenaz.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/IFgiEjj/bafimobub.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/leguvefu/blanca_nieves_y_compania_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190cc4ef-a999-4b02-9693-fc9da938c4cc/the_hangover_full_movie_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/network_routing_protocols.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/pokemon_arceus_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/94199684908.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_off00019df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DF9 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off0001a87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A87C 5508 bytes
SHA-256: e888223ca1c3707a23db095ab995ec67221029598f869bc0982db9d52fb950da
font_02_sfnt_off0001bb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB48 10844 bytes
SHA-256: 4eb491a927425848487cedfd99c6a016f11a3c6c1d140a77bea49313409f28af

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