Malicious PDF — malware analysis report

Static analysis result for SHA-256 db22eb1695a26079…

MALICIOUS

PDF

69.1 KB Created: 2021-03-22 21:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 54ae7ac2cba46d510b333d714498d0e5 SHA-1: ab259a4a85a7629e84dc201e27038dacfce68be9 SHA-256: db22eb1695a26079e5cad2524754df48e177dbb4df452072de7daf8d8f16a703
186 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, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear instructions or lures beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/award?keyword=telugu+bible+pdf+with+references PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fe1ebcb7f189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490930/normal_5ff890bb1e448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5fd09ef7a7450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_60183808baffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_5fd7d81a757b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5feb3e2660d0f.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/Z4sjjj3/second-_guess_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/juzilolawu/Ghcjad0/red_and_blue_tie_dye_background.pdfIn PDF document text
    • https://zawevujavesid.weebly.com/uploads/1/3/2/8/132814930/zudisevafa.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/jhf85XC/dapawuxuxuwigixix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_6039965e89d05.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/wigafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495392/normal_603e40f4808d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427795/normal_604b1f5f132d8.pdfIn PDF document text
    • https://gesurori.weebly.com/uploads/1/3/4/3/134353915/tonududal.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/sososojowovoma.pdfIn PDF document text
    • https://wufonujixu.weebly.com/uploads/1/3/4/3/134386315/fetumopejemeko_movitas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_6043082ab33b4.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/1616d75d-9ecf-4b8a-96b4-f3f635ef9a85/86599019468.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/79497167052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8991aaa-151f-4623-bf99-eb90c5edcca6/bemotomizasela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f4b8c3-80ce-434d-92d7-47c35893cedd/tedubuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/xafujifazixenujisosubob.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_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 5388 bytes
SHA-256: be34f2e41fcb5399009c4421ab8ce998da79c57348ee4db81499650c06bb5d5a
font_01_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 11072 bytes
SHA-256: 3b4a05741661f14273aba0e2cfcd075dd41d66c6859f958f39bbaee9a22ef955