Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac365ee53ba4e8b…

MALICIOUS

PDF

70.2 KB Created: 2020-11-18 06:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4aa7de3f0a00857683ad380c4ea372b6 SHA-1: 1899073884b290c470de694ac7f0fd61a20d8bc7 SHA-256: 9ac365ee53ba4e8bfcb4eddf8591d3f5245d4df98c54acb41c1437f2ce174503
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=ap+biology+grid+in+practice In PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/vosemafebele-megozela-juporepiwa-galexazurid.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/kapavuwonujupuzaniz.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fae9d863378b.pdfIn PDF document text
    • https://zaruteso.weebly.com/uploads/1/3/4/7/134716260/9000469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479470/normal_5fb2e7fa24a3e.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/856e4a1a-5d46-4504-bac3-19f40c380fbc/international_relations_brief_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eca70ef-3c66-496a-955b-cef1ce5eb14d/musowumafudemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5aa95f-71ab-4cb9-b923-123027e82e87/355796374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2252b7-8313-4a6b-a13a-d56e0a2a226a/86959209198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b2643a-cf4f-4c89-9670-1c5801b28ab5/67957946531.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/capgemini_aptitude_questions_for_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16b0294-8bc9-4d2b-9787-b9c56850be36/rise_of_the_runelords_anniversary_edition_free.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_off0000d368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 5292 bytes
SHA-256: 3af8efc8dd696484f61404500383ead3370f1bbe7d99307e134a6ba77ebc3b84
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 11388 bytes
SHA-256: fb4f742acf867a41f4d26eefb85a5403f7581ffc80b3956b03b76e321e2a7178

Open this report in the interactive analyzer, or submit your own file for analysis.