Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2272a624bf6e6f…

MALICIOUS

PDF

84.8 KB Created: 2020-10-28 15:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dbe40115f9f352d739d9f0af2e2905d5 SHA-1: b36c7da15f82342861cc831e7c8e6190bd487b6c SHA-256: 4f2272a624bf6e6f3e2ad32bda1884387738ce82c19e2b3e88dcaad5845143fb
162 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 an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.me/pify?keyword=limiting+reactant+and+percent+yield+lab+answers In PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/dulisesadomisaboduw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8b9010dca05.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/garejidonuxuf-tevapev-roxomefaju-gekolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f918281b2f0a.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/ae413c2dd30e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f94f02992e3c.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/tuwumilonafidom-dilolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f95f32c6d913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_5f99324f7307f.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/pekakala.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/lopadivupudexa/zavorejodovixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0826/0763/files/54578926157.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/56420616343.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/esquema_de_la_comunicacion_no_verbal.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/tiroteos_en_estados_unidos.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/83934412573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9198/3013/files/fapisaragugameveda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/kulefumale.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/16398604899.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/vazegeromepejanugozoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7907/3436/files/ebook_inovasi_pendidikan.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/2692033578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8091/8203/files/xipoxedemovosunex.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_off00010edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 5668 bytes
SHA-256: 2df35569a9852d031f853fe9df6def13e0f0494714ba89a680fb77c5cfb046f2
font_01_sfnt_off0001221c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 10356 bytes
SHA-256: efafbe295e10a37bbc90871d0b942d607c163f2ac07422080de569c96f10e5a6

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