Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52bf15c9ec5ac47…

MALICIOUS

PDF

83.7 KB Created: 2020-12-22 23:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 89353ff778541b2e03dcc22b65ba2165 SHA-1: bb16060738e05660df46fae43d12b3bec98fd8b4 SHA-256: f52bf15c9ec5ac474d5d87793fb839e7e2f970ae1962db9e85d1eec5a34cfb83
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary malicious URL identified is https://traffking.ru/123?utm_term=nobility+word+whizzle+answers+places+on+the+web. While no scripts were explicitly extracted, the heuristic firings strongly suggest malicious intent through link manipulation and redirection, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffking.ru/123?utm_term=nobility+word+whizzle+answers+places+on+the+web In PDF document text
    • https://vetakowiv.weebly.com/uploads/1/3/4/7/134733886/bomesuxuxoratix_depuluvinopego.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/dovolevakunafubiket.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/refupimafam-lusagutipu-rubomowikaraku.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/tovanurebul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fd673082a2c5.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/jowutoneranemuk/manualidades_navideas_con_cd_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af83a445-2df0-40ba-a6c8-60bee2c6285b/atlantic_city_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fb26a4-903b-4d97-8e32-2f4090f798ff/amantu_billahi_wa_malaikatihi_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff550ad4-d93d-49f7-b768-4dabdc6b9564/bepenotedimuruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb6d0d0-6572-4540-aba7-3f0ba9eea486/83066917691.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19d720a2757459be7f0be/t/5fca86cacef45959076dfa72/1607108301932/54306835614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd6c4e2-1001-4804-9728-65be9efbe7cb/do_palisade_cells_have_lysosomes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d8d31452f90b7ff7981f/t/5fd6801f164d0f203c804337/1607893031515/comparing_earth_and_mars_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e306fc7d-f4fa-4a35-bd62-7602ad258da9/xelopivodoturagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f93523c-a8af-459b-8a45-24931fe5b38e/10463211264.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://misis.lausd.netIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011733.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11733 23120 bytes
SHA-256: 01e167411cd2f265f4c063f995086f6c2ce927f1a4cc9a68d935c0e578c1b539
font_00_sfnt_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 5516 bytes
SHA-256: 909fa4c9fd147eb53d8ff2752f9a4ab75ff6983994585013321fb00089a376da
font_01_sfnt_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 14324 bytes
SHA-256: 2669a55dee042626a6656628b769f3327f2493b2b17bb4721f70e91a705b0bb7