Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6ddddb5f781633…

MALICIOUS

PDF

71.0 KB Created: 2021-03-06 23:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7861f84e274e8cc1e56dc22f3c47693b SHA-1: ccbf82e5a6569bc97f899fd5209a02cbb5f21e3d SHA-256: 1b6ddddb5f781633355004a58dc9653953aa8335ecb997e2b04ec286b9ccaa1d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=my+neighbor%2527s+dog+is+purple+poem PDF link annotation
    • https://bamiwesuwo.weebly.com/uploads/1/3/5/3/135390748/c73a20cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5fff3148ebc21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_6032aa788633f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fd878e2abafe.pdfIn PDF document text
    • https://zezonusadife.weebly.com/uploads/1/3/1/4/131410479/5bff25c7f8d6.pdfIn PDF document text
    • http://nevodoma.iblogger.org/zufesatosuwewuzurusododi.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/felesezerodididigapadi.pdfIn PDF document text
    • http://vulujukido.iblogger.org/modern_calligraphy_font_cricut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fdf305f8cc21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_601ff78113a25.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/79580b53-1726-49e3-9b07-118fd5425b65/69489475707.pdfIn PDF document text
    • http://wewopok.epizy.com/wunel.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/29484491106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47439280-336f-4210-a61e-db4876d5c8f8/what_is_the_moral_lesson_of_a_christmas_carol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a032084b-9529-42ad-b295-3e9a1d0e18b7/23734143712.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/asmart_remote_ir_apk_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ec3830-4cbd-4f85-ac84-e20fd85b7944/does_elgato_hd60_s_work_with_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f616360-b4c6-4168-848d-63fadfb2e711/what_is_the_resonance_structure_of_o3.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_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 5444 bytes
SHA-256: 1a444674627e200b38bbeb1f6d2309eb9db4441e148503f52f78ffc5061e52d1
font_01_sfnt_off0000ec05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 10184 bytes
SHA-256: 1534de690ff0e4745b0c3047ee3a101af91d1cacdd82c28e4ff9ef88da8fbc65