Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf16aee45d9531be…

MALICIOUS

PDF

105.6 KB Created: 2021-04-30 13:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bb5c49d238236474cdd1fde781bf0520 SHA-1: 5b4ab1ce726b9fa7846059fd80348e4e47a3a8a7 SHA-256: bf16aee45d9531be4ca979b13a2d9c098180594a18c44fd357f9e78b93db851b
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 0.9993

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://dugedepap.ru/strik?utm_term=who+makes+swisher+zero+turn+mowers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422367/normal_5ff284103bf57.pdfIn PDF document text
    • http://itclick.info/the_light_of_egypt5iybp.pdfIn PDF document text
    • https://nugaridepi.weebly.com/uploads/1/3/4/4/134474671/ruwikoguk-mugopazasogil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_605363a8c982d.pdfIn PDF document text
    • http://cupe1.ru/how_old_is_prince_caspian_in_prince_caspian193jq.pdfIn PDF document text
    • http://menformula.xyz/litikeligoxqrg4i.pdfIn PDF document text
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/118e417f.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/70793460784aknc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_60523b22aae80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fee97d7797ac.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/senodiw/cheat_sheet_vim.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_8694481860fd4808bc489e8b1ab27398.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zugutixe/celebrate_it_templates_all_purpose_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/27983703611.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_73590c41a64f47f6838f5e363861d62a.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_345981a659894a968023cf232d061ac1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/nenugujafenetodoro.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_8d6171c505384e5d97a103a159d042a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/tawidifepajaxus.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/marriage_anniversary_card.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/hogwarts_castle_minecraft_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/under_the_dome_season_4_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/sengoku_basara_4_sumeragi_ps3_dlc.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_off000153b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B6 4992 bytes
SHA-256: 8e81e15b855830312736ff369d919f7b805121c29b311be93f4bb37120fa0fde
font_01_sfnt_off0001649f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649F 11236 bytes
SHA-256: cff166024e8f5e253a5f20f7a7cb02c2aa9b61a34996bfcadd7beebd3d3acfe9
font_02_sfnt_off00018ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AD1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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