Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d86bf69dbb01dc5…

MALICIOUS

PDF

73.7 KB Created: 2020-11-19 03:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b36b61c91187cfa9218851e0ecee0678 SHA-1: 1d4b02b5efeb5cb78ef2b7309c571413ead78070 SHA-256: 0d86bf69dbb01dc5548b027cc5b6bc3cf38e70ac77aaf995898ca4c337e00738
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://traffnew.ru/123?utm_term=boy+over+flower+season+2+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f9b80541dd6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_5fa6494445f79.pdfIn PDF document text
    • https://xezojasupaxu.weebly.com/uploads/1/3/4/3/134352535/70195.pdfIn PDF document text
    • https://tofesasezi.weebly.com/uploads/1/3/4/7/134730688/6111a48434.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/wakadolis_molenedaviziz_lafabaxaligiro.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/rulixajelusoxom_kiwadujobev.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/84684870792.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mekor.pdfIn PDF document text
    • https://s3.amazonaws.com/kamigovitakiril/homogeneous_mixture_examples_science.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/printable_microscope_parts_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/lefuwolazatuji.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/95666324696.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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5336 bytes
SHA-256: 83da622895b422bb2e57030c75fa8f979ce421c6641a58701b72d31bc970a952
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 11148 bytes
SHA-256: 721f9b346b516426b48063799a728667d19f45e91f291a751d2d8aae04a6c21c

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