Malicious PDF — malware analysis report

Static analysis result for SHA-256 6018cf0efdeb0def…

MALICIOUS

PDF

70.5 KB Created: 2021-01-25 20:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a32c81f73342a03be0795b97e1a7b70b SHA-1: aad30eeddca84f31d7d9783dafbc27069738e022 SHA-256: 6018cf0efdeb0def74fda1ac64c894a6b1f75d1e92ab57a6046ece1e0fef5e18
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=arkham+knight+ending+without+riddler PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470231/normal_5fe493c274915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495040/normal_5ffd0ce9e4013.pdfIn PDF document text
    • https://bukudavura.weebly.com/uploads/1/3/0/7/130739260/281793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5fdc39b8e3ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_5fe890a2175a1.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/7b51cc671141edd.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/sadipogozuwagawul.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/8ff159d.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/9084735.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/zezunade_xenubonuv_gelov.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/8c7273e7d02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5fe2742f54593.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/91f409e4ff00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_60011be6c125c.pdfIn PDF document text
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/7027363.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/5851646.pdfIn PDF document text
    • https://serudifatu.weebly.com/uploads/1/3/5/3/135324897/11575153.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/fazujo/47600778259.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_off0000d7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EC 5204 bytes
SHA-256: 363c63ffa9a695551486317e43412fffd837ebbb3a6dc85eaf853385b7a3ea0e
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10368 bytes
SHA-256: 3d3e6b585481d50c56ab9828db116c9b5feefdae5aaaa46c5e28d80a3d6589b2

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