Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9928d6121cfabd8…

MALICIOUS

PDF

68.3 KB Created: 2021-02-18 17:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31da90c3f9046eae3a092d98c31e9993 SHA-1: 3754b9f8915a4948b55f6514d9aca18772da184c SHA-256: f9928d6121cfabd8deaa6d084d6c39247891db2000b82176b4cc11112b82484a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/wix?keyword=virtual+cow+eye+dissection+game PDF link annotation
    • http://vvinorama.website/ejemplos_del_lenguaje_denotativobbrjn.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/4795109.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/Phbjjgh/adidas_sweatpants_womens_outfits.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/wymhjje/index_of_movies_now_you_see_me_2013.pdfIn PDF document text
    • http://jushq.club/goldstone_report_israelyp0e0.pdfIn PDF document text
    • https://baliwiwun.weebly.com/uploads/1/3/1/3/131380001/3340249.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/gdhVhdv/11769514471.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/IoOSthc/lupatuxakaxotoxavobujopir.pdfIn PDF document text
    • http://interbank.link/40982387789abtr1.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/9af9cacdc56.pdfIn PDF document text
    • https://murovufusefafa.weebly.com/uploads/1/3/5/3/135331463/vutavav.pdfIn PDF document text
    • http://scrlt.xyz/nazarick_all_floors_minecraft_map_do03tbu.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
    • http://godavuvexo.epizy.com/pomibun.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/abrogation_in_islam.pdfIn PDF document text
    • http://temefolix.epizy.com/zitazemozowawa.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/cdfm_module_2_study_guide.pdfIn PDF document text
    • http://sitojedakolotil.rf.gd/excel_spreadsheet_for_rental_property_expenses.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/2727247104.pdfIn PDF document text
    • http://xuneviwek.epizy.com/fisobuvusaluxebedovesupe.pdfIn PDF document text
    • http://gobonelore.epizy.com/wulifuxobidane.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/76714715094.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/23214499764.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_off0000c11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11F 5300 bytes
SHA-256: e7e8280877a966f7370e5f2927893299c69e11d36d14e26a0fcae067926f2beb
font_01_sfnt_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 10028 bytes
SHA-256: a5653b5d5a84c060c3d5d82ac961ed1198eccc976a14cc62ef2b0880fdce635e
font_02_sfnt_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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