Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dce3a3db5a65172…

MALICIOUS

PDF

71.4 KB Created: 2021-02-14 16:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d75a5cbc97f3f1548cea6809ee0a0a52 SHA-1: 04a297a4bbd3629185895c42f0107593067476ce SHA-256: 1dce3a3db5a65172cf6efd526cbe7293c9aaa3a9cd5fa0cb8028ce203cc7c924
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://druttle.ru/wix?keyword=school+worksheets+project PDF link annotation
    • https://cdn.sqhk.co/pelotuwew/3md7Z7J/verotofi.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/jfRRiie/96958663219.pdfIn PDF document text
    • https://tovunebutulewe.weebly.com/uploads/1/3/1/8/131871744/54aa1ae91ac88a.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/ih64jgi/zosate.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/fipifulifalineb.pdfIn PDF document text
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/wefizapududozodezibo.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/89d741b7f.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/slk0nhg/bee_craft_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/dgKgebl/agent_ransack_license_key.pdfIn PDF document text
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/xivigakogimuneba.pdfIn PDF document text
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/3382219.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/7222596.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/nivotod.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/hK8gfhg/zombie_themed_party_invitations.pdfIn PDF document text
    • https://resevaguwitim.weebly.com/uploads/1/3/5/2/135298688/wovagejibejoro.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/ganubatebedoxez/kepepotusedoxuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/jorewanu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/befunky_pro_free.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_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 5144 bytes
SHA-256: a9e3d760185907ec8b68dc82ecfff497afd8b763fe8abe6f72c0dd0d4edaa053
font_01_sfnt_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 10704 bytes
SHA-256: ae2ebf47348dd32f91d7b39a3cd85fe1ba0f13fe06fe526ad3f18fe23f1f17eb