Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f61c2b411331cf…

MALICIOUS

PDF

78.3 KB Created: 2021-04-15 15:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a4daeb40f29e7fdf9577c311482e3d23 SHA-1: 708fd79eacea186de01cc39194729ec4c3d5fb4f SHA-256: 94f61c2b411331cf2cb49f71b212bb9d424671b99688aed62c30fa80904848cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9964

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=bose+companion+20+speakers+review PDF link annotation
    • http://copyright-helps-team.com/duraflame_3d_infrared_electric_fireplace_stove_with_remote_control_-_dfi-501012mew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_606e43122cf40.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/49742771310.pdfIn PDF document text
    • http://fc-aromat.ru/how_to_change_region_on_sony_android_tvctvef.pdfIn PDF document text
    • http://palogaza.sportsontheweb.net/bijutulubupagifujuxuzizeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5fee9c1c82204.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/dakokadurap.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/borevutogekowibatolowikes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_60218947af324.pdfIn PDF document text
    • http://dvestideyli.xyz/tere_bina_jiya_jaye_na_song_free_downloadb8bf2.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/how_to_make_a_slave_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_6039de59a5ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_601d28459d7ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxewape.myartsonline.com/kikipitororekekezuvin.pdfIn PDF document text
    • http://nibubatovavav.atwebpages.com/34020576888.pdfIn PDF document text
    • http://fujuresaw.epizy.com/mugaredolupamozoven.pdfIn PDF document text
    • http://sobunase.epizy.com/42177872461.pdfIn PDF document text
    • http://relilirijupike.epizy.com/77692923058.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/37097063238.pdfIn PDF document text
    • http://bopubedoru.myartsonline.com/ceo_delhi.pdfIn PDF document text
    • http://bomajada.epizy.com/xefel.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/libekesenejizos.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/lizopunuxemodipadipom.pdfIn PDF document text
    • http://sujutesar.rf.gd/fybsc_botany_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/woxorawiber.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/android_developer_notification_bar.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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5584 bytes
SHA-256: 979399fa90d518ae93e58e627a1a7d2458cd1a5391df63aefc2063bde8c3bf06
font_01_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 11516 bytes
SHA-256: aec24c9763ff763979b93bd3bb3b5bdf279d11412fe874a9a30f073c33575e88

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