Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2737093817b71a9…

MALICIOUS

PDF

82.9 KB Created: 2021-03-09 15:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8f9324f6e13ecb0f889b9274d5c88422 SHA-1: daa768aaf604622a02de15f7d33bde613438be58 SHA-256: f2737093817b71a99526c862ff19064e683037bea12d36a13437776ed173bc41
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, flagged as a link farm, with a primary malicious URL pointing to 'https://jumiwimov.ru/strik?utm_term=calorie+counter+chart+app+uk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=calorie+counter+chart+app+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425230/normal_60413039ec68e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451205/normal_5ff7b4e642bd3.pdfIn PDF document text
    • https://sojimivur.weebly.com/uploads/1/3/4/8/134883767/1966092.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/kingdom_animalia_classification_chart.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/brother_hl-2280dw_scan_unable_af.pdfIn PDF document text
    • https://matebafezit.weebly.com/uploads/1/3/4/5/134592398/2e9a738.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/zeven.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/best_shop_vac_for_woodworking_uk.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/84edc3.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/wizakokowe/riruvowepajaroneguw.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/in_what_order_should_you_read_throne_of_glass.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/32110396167.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/8540744395.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/grief_and_loss_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/chest_workout_exercises_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/el_dificil_arte_de_amar_pelicula_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/14838625964.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/fodedusebuvafapesebika.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/champions_league_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/83833266182.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/performing_multilingualism_in_europe_and_beyond.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/neat_video_premiere_pro_free_download_mac.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 4812 bytes
SHA-256: 8619813425e5d4ed1013a505c72df66b3d703d668aac3075d2623895e8fa820e
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 10880 bytes
SHA-256: 429bd110a9e6b6697a4480be4dd38cc08fae2ca81b6936b63c3d10e0a8499959
font_02_sfnt_off00012857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 16392 bytes
SHA-256: 8d9529fca8e49fd747a132c86257b3f003f6793d9f50918e3e02e184cbe99d44

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