Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45e5ea8617ea058…

MALICIOUS

PDF

73.4 KB Created: 2020-12-04 13:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 717d9ff53f1355ff751d2b823dac88d8 SHA-1: 9b8f0be3cb366c8b9187e1362dab0fca2661fc61 SHA-256: f45e5ea8617ea058dfcadeba7db561aa7aa6baa3def628842045116b8303b759
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 0.9997

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://traffset.ru/strik?utm_term=lay+of+the+land+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fc6d7bfd399d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5faf88e7e277f.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/9874951.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b72e9a15-e8e5-44c6-8f29-8edac7462955/58523360677.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f712e537a05ef26dfac/t/5fc7d04c4bde7d3c2ce0bb3c/1606930508860/1355683092.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c38ff13940aa24a8d75/t/5fc93c0105199c620426810c/1607023621153/ringtones_tamil_christian_songs_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68d526b97992eb5827da1/t/5fc8d8e58eecd53e39f4bec3/1606998248154/ncert_books_class_11_maths_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c400713-5398-4c1c-bf4b-7a8787e74afe/vinupuneresiruna.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b80e5bcb0228a28e2589/t/5fc4135bcb3e0f5771cf69f5/1606685531531/presto_pizzazz_pizza_oven_instruction_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a12cc6d9645836424050/t/5fc73b7e7995075abde05676/1606892414522/covermore_global_sim_top_up.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD820 4552 bytes
SHA-256: f802be152237b4a402ca8f293c3a17255b6c191d58ded033f0c260c5ee1731b3
font_01_sfnt_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 10400 bytes
SHA-256: 63ef2b1d4d704f1cfac62d51941c2bab80bf0f8c7d0185512befcd9d75915cd4
font_02_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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