Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8308edc4df14c00…

MALICIOUS

PDF

45.1 KB Created: 2020-10-26 01:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 17a203ce01d9c181e6ef9a1b8c8b9904 SHA-1: 150b99943b94226a9a2de2b6bae728befddd6071 SHA-256: d8308edc4df14c0052e936a554af9e0979da941ec8e2a86916b1304baa473526
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but ultimately redirect to a known malicious domain. This technique is commonly used to distribute malware or phish for credentials. The ML classifier strongly indicated maliciousness, and the presence of a redirector link further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=achatina+marginata+pdf In PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/2379673.pdfIn PDF document text
    • https://mogawurid.weebly.com/uploads/1/3/4/0/134042680/jebowiv.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/4302760.pdfIn PDF document text
    • https://jikesekija.weebly.com/uploads/1/3/4/3/134367489/4727095.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/bazepajepofina-zenikogoso-vewidixefodaga.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/lazatev_ludurebufex_jekili_xojoluko.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/kemodufedafuxedif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5f959ceb7e085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f87c88375a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8eb1e78bfe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f8a271a5cd73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f874ad1cde5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5574/1589/files/54417964273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3815/2133/files/management_by_objectives_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6960/1445/files/wowhead_classic_druid_tank_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/dolphin_emulator_4.0.2_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/32331009156.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/69016608714.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/25632344073.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/futupavowuvif.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/81117893769.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/wifidajiturukurovigiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/72818398767.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_off00006e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5348 bytes
SHA-256: d2b3a1bc038d999cfa7418a92cf1d808cf68447828e79556c6d71cc68cfcddba
font_01_sfnt_off00008094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8094 11468 bytes
SHA-256: 6a96aeaaef263c6659640b1bd6b0fc12c70912294ce676d377f594c6888d3c80

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