Malicious PDF — malware analysis report

Static analysis result for SHA-256 179c5742250faa42…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 13:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 966448007d283207c27ab890975e126e SHA-1: efb9532adbb55a6272eb30b6e34e05e375f01f4a SHA-256: 179c5742250faa423fd3716b77801f824353267008657ebe13b2104a7f96bca3
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wix?keyword=constant+term+of+a+polynomial PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404524/normal_603612cf2d9b9.pdfIn PDF document text
    • https://bakovumosu.weebly.com/uploads/1/3/4/6/134679162/felamaxev_kexegexe_munixotuweb.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/2897334.pdfIn PDF document text
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/1809767.pdfIn PDF document text
    • https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/7329645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5ffb4d38b8ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/wejuladuke/dJyjihg/83086955049.pdfIn PDF document text
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/fulovojiniji-kexetiwarovozis-gimabusiv-lomajifanamufi.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/3455391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_6024397142e44.pdfIn PDF document text
    • https://gijedilegin.weebly.com/uploads/1/3/1/3/131380969/pepofijopawagikugot.pdfIn PDF document text
    • http://trujillostacoshop.com/navien_240a_customer_reviewsh72ks.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/c0230e0f0c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/fajenorotuxuwozixebaw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79E 5052 bytes
SHA-256: 9ebf3930e98473c43d03714a7a330d45939a019d49261a7b26cd025a1ebe8b7c
font_01_sfnt_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 10544 bytes
SHA-256: 0edff286dce1f91111e6b09b08504b8eb377f127cc292abafc4db0b58b3af44b
font_02_sfnt_off0000fcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 16084 bytes
SHA-256: 249651805b0a8f5b4743f17da7e3943b18be49f9c75a96c0f18a2f62b87e55bb