Malicious PDF — malware analysis report

Static analysis result for SHA-256 d779a61c4f0cfa7e…

MALICIOUS

PDF

69.6 KB Created: 2020-12-26 08:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6bb34602297680ccaa48551be8618f9d SHA-1: 95a467fd291ae50cf4d44faf7dc63fbd03331b22 SHA-256: d779a61c4f0cfa7eb338b9e1f82d7cbeb85980e25c3bf323a450814cae2e7f12
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or redirector campaign. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute traffic to malicious sites.

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
  • 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://gettraff.ru/aws?utm_term=building+drawing+pdf+for+diploma In PDF document text
    • https://cdn.sqhk.co/tewisifupib/haQ6Ujh/1408241037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fa2f1235625b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_5fba3c97026b7.pdfIn PDF document text
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/xenepodolawoniv-jalidovijovule-desojakiwonu-wasinifisusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5fbfba76cd580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_5fd90378dd0fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/20149e1c-93e0-42b9-95bb-db41be043ca1/avakin_life_generator_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c066ddf2-81f0-494b-969c-6275c1f03baf/xigifizekino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ada2aa-d82d-4059-b036-eb53e4551821/58743001140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a821adc6-7458-4e8e-9e59-f1e7c84f4efc/assign_string_to_char_array_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12903a34-85c9-498f-a66d-af6683ccfc6a/20_dry_container_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abdcf58-b921-4612-a1d8-531f9fd541bc/doxibenuzolagija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef4ee4c-2bcc-4c74-8754-afd031051959/55742711561.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_off0000c7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D5 5008 bytes
SHA-256: 36e9e20e94b3c3922ec1b27ca4e7258f8eb5c3766317daf5617d3d959850ebe5
font_01_sfnt_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 10308 bytes
SHA-256: db481b78b6c7a2141be0991700af1dc956a50cc66bcdcb26dcd4c432fd258e15
font_02_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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