Malicious PDF — malware analysis report

Static analysis result for SHA-256 623629d82b6025cb…

MALICIOUS

PDF

49.1 KB Created: 2020-11-06 02:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 0341b14e401ecbeb8deef157d9145627 SHA-1: 84315b059dac8dfe7ccd3154688a3ab8b9535799 SHA-256: 623629d82b6025cb4670665e130414e2ca60ec0299b0fc136bcbf7f10171efc8
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?keyword=1999+suzuki+lt80+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f9173bdbdde8.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/lofofimatedekaka.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/dozares_mugizinu.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/7c9eb75542.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/gijexe.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/4463143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f8b9b5e27847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f9194054c92b.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://s3.amazonaws.com/zuxadol/vijibomasutefetazug.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/hp_z230_technical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/28517813490.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/avoir_etre_passe_compose.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/wewuxajexizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 5340 bytes
SHA-256: 55326c7f1cd4147936e206df05cf9836440dea629f8b0a512d7e05180c2e8115
font_01_sfnt_off000084df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 10928 bytes
SHA-256: 863ba039582070aee96d33a7a50c8f5759ecd3b70b9c882791306e82948e4358
font_02_sfnt_off0000a9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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