Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1b034c7d0b3bda…

MALICIOUS

PDF

71.7 KB Created: 2021-01-21 10:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0b98fa367fd7594e057fc801f5fc2cc0 SHA-1: 018dd3a6a83ad67095864b817a274054b0f6868d SHA-256: af1b034c7d0b3bda178618cb18dff8250ef3c59f502a941f0be68aea7319bbe0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=what+is+ddu+driver PDF link annotation
    • https://cdn.sqhk.co/fasaparoba/ihmhigM/relotapedanilulow.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/fhdhgTV/jujoraraninejupivimete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_5fbd08655a99c.pdfIn PDF document text
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/vemuve.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/loxivabut-muropadolotipon-jiveboziludam-pesipepom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f974c2ab06d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458635/normal_5fcda79f291e9.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/bLgpgex/taxobag.pdfIn PDF document text
    • https://cdn.sqhk.co/zusegekum/dJifK2n/photo_montage_collage_art.pdfIn PDF document text
    • http://xelirap.22web.org/wagupobanaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelidug.epizy.com/avast_offline_installer_gigapurbalingga.pdfIn PDF document text
    • http://kijenor.epizy.com/navy_information_warfare_pin_study_guide.pdfIn PDF document text
    • http://wisunomimat.epizy.com/3d_architecture_software_free.pdfIn PDF document text
    • http://gitogopafo.epizy.com/lemamiwe.pdfIn PDF document text
    • http://bidexegope.epizy.com/lab_attendant_question_paper.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_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 4956 bytes
SHA-256: 42201d08e5b1ad33ca88190cc25ae6b671a759281277efcd2e9f23caeae4a584
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 10620 bytes
SHA-256: 7e01719dd3cb7039c1b4c8ea3d5594ef1c7fbc3ab2b1828de299f30fa0d154a3