Malicious PDF — malware analysis report

Static analysis result for SHA-256 d488c09962b65fba…

MALICIOUS

PDF

68.7 KB Created: 2021-02-02 04:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cbd2eeb5c7fa0a77791d3a178013ef3c SHA-1: 8c626d793464574d48d8d7c864bf55155d43c433 SHA-256: d488c09962b65fbaa26bd3e7df5145b4942a630054814e8da6fa3631c305c36f
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://baarspo.ru/wb?keyword=best%20place%20to%20learn%20android%20development%20online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5ff8a7ba8eae8.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/6777668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5fcced8c5d7fc.pdfIn PDF document text
    • https://bazitakitavame.weebly.com/uploads/1/3/5/3/135394276/falikadozipeje_pobexiruzusa_vunekobubone_fanalusunaduzef.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/dHhiiic/luxijuvowijimuxuxoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_5fdc052356508.pdfIn PDF document text
    • https://ronitodusod.weebly.com/uploads/1/3/1/3/131380212/4398582.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/gehagiv/xezerevinufujewefasag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fe7691f0b407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5fe8b923e9b9b.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/6hcjhNj/real_baseball_3d_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/idiahrg/83391827360.pdfIn PDF document text
    • http://bikuribowe.22web.org/74332620434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fce404b8c0c3.pdfIn PDF document text
    • https://wotuterivakevom.weebly.com/uploads/1/3/4/6/134608936/fezikopavu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 5328 bytes
SHA-256: ec0ae1cecdf6340155de5119fdec0c905d6019d37ed4b4d2cfaa26e235c4190b
font_01_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 11096 bytes
SHA-256: 55af1afa51313145c5e36a985678eb0c54a909c787f1f316093b2c64682ee5db