Malicious PDF — malware analysis report

Static analysis result for SHA-256 623d27436f14fdec…

MALICIOUS

PDF

68.1 KB Created: 2021-02-02 19:32:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4fc9a25400de07be24ef734dae33468f SHA-1: 00f256ca18e5a5f6e7de8ab7780d084a784a6714 SHA-256: 623d27436f14fdecb44cb08308dd77919801bb912895ff6d0e1034dc2bcfe45e
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://jottigo.ru/wb?keyword=healthy%20food%20worksheet%20for%20kg PDF link annotation
    • https://cdn.sqhk.co/muxigatatini/ghHTzgc/street_chaser_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/cHjgZha/nosopudadamurozekumedewu.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/kefujabavobof_kizifute_nufeposeto_biwaletakagil.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/jhE8KNr/61144046199.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/djgiwVu/nulomutevebudatira.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/jgfibVt/19131919168.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/a9e98.pdfIn PDF document text
    • https://nugelemuv.weebly.com/uploads/1/3/0/7/130739301/sugewovugezoxep.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/ee38bd8d2.pdfIn PDF document text
    • https://bizugejukuvav.weebly.com/uploads/1/3/4/3/134322279/1715389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5fe5677acac21.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/eQhXiaF/beli_pulsa_listrik_dari_m_banking_bca.pdfIn PDF document text
    • https://wowaximemufa.weebly.com/uploads/1/3/1/4/131453960/7646877.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/gZJjaif/46294531872.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/gonima/final_fantasy_tactics_android_guide.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_off0000cb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB94 5388 bytes
SHA-256: 17ec55ff388e5f3b3355987ee93d43d017e16cf7512285e00b7f08198cd81f8b
font_01_sfnt_off0000ddfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 10532 bytes
SHA-256: afc0f8ea04570b4fc6e6a1b32b4fe73de84fb20f991cd487e8bbb581eb56a5a8