Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfaacf50236cbee…

MALICIOUS

PDF

85.9 KB Created: 2021-01-11 01:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c07e4197ae1213b0ce5e45ff7800db2d SHA-1: b893b63f61ca8dc2e4b34b8c1bff01c20a58a929 SHA-256: cbfaacf50236cbee700e679e87012a63794d65a1790302e6992d993eb3657be8
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, with one identified as a malicious redirector. The document body is obfuscated but suggests a lure related to 'Ghost recon wildlands map pdf'. The presence of a link farm on disposable hosting and a critical ClamAV detection strongly indicate a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=ghost+recon+wildlands+map+pdf
    • https://site-1178370.mozfiles.com/files/1178370/vakuwufi.pdf
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/b2e508ab.pdf
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/52c61148eb4eee5.pdf
    • https://dugufenejoropez.weebly.com/uploads/1/3/0/7/130775504/larazixijig-tunikik-bijes-darexewogom.pdf
    • https://site-1176433.mozfiles.com/files/1176433/project_management_dictionary_definition.pdf
    • https://site-1174888.mozfiles.com/files/1174888/double_bubble_tea_menu.pdf
    • https://site-1180853.mozfiles.com/files/1180853/fusokagogixezupebaguroxe.pdf
    • https://site-1172884.mozfiles.com/files/1172884/amazon_prime_now_warehouse_san_diego.pdf
    • https://sozatugija.weebly.com/uploads/1/3/4/8/134859818/779edc101d2c.pdf
    • https://cdn-cms.f-static.net/uploads/4423696/normal_5fe64e5ba825f.pdf
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/1427189.pdf
    • https://site-1178687.mozfiles.com/files/1178687/jerewupatonotewisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d6.bin
775f03ff04cbe9bcbe9579171e781b5d292f3ec43bb0c4e07ff94b6b0dd4d127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 5516 bytes
font_01_sfnt_off00012580.bin
b82ef42abb36211942beca169975f83d92910c4cc2327840064fa60dd6a70279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 11040 bytes

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