Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b23d74b67ebd12…

MALICIOUS

PDF

48.8 KB Created: 2020-10-17 18:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 57d5c1963a7a6b57d11d62e4797ceb65 SHA-1: 7e13caeb7f9932dc62d703a35b333692b613e197 SHA-256: f3b23d74b67ebd125b2bfc42cd1cad51c6d92c98725641a959d65829578bd61f
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.me/123?keyword=gif+to+pdf+conversion+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f88aaf1dadac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f888c1666c34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8aac8589d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8a2147b7040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f88977f557d1.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/4697230.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/860100.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/7660470.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/2553404.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/eecc1.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/1409860.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/jowugodojuben.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/202a75.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/gaxulikotativo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9750/1080/files/jinovogomalexuxifatoguja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5842/1656/files/harrisons_principles_of_internal_medicine_20e_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9975/7218/files/bitip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/70812845367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7006/0704/files/jomagogojukazawosazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/rulemafige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8628/9333/files/frozen_beef_burgers_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7956/4448/files/92-95_civic_stereo_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6442/2300/files/slang_terms_for_penis.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_off000077fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 5032 bytes
SHA-256: 2df90d2d59381cd6831932bb441a9d86140d4b26397d0f63668a6ea9e92c512a
font_01_sfnt_off0000893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 13808 bytes
SHA-256: de9df7df18ecd1d3f17b59630daa7c1ae6206e68f079cb973b95848fd406f799