Malicious PDF — malware analysis report

Static analysis result for SHA-256 674b4b2a465a9656…

MALICIOUS

PDF

131.5 KB Created: 2021-06-06 12:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a610c78a7d9b7ea11a71013efbf641d6 SHA-1: e22fcf9f235057db6bf1793d6f65d919cf09f0e9 SHA-256: 674b4b2a465a965632d1ca783da52c528e8ff926670d1b97e6350811b0afdb32
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 0.9997

Heuristics 5

  • 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 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://wastran.ru/pbw?utm_term=brother+hl-5240+driver+windows+7+64+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459058/normal_6034e3244e47a.pdfIn PDF document text
    • https://xopubisewono.weebly.com/uploads/1/3/4/5/134507782/tobupoduzujega_reworegiwo_vukojameleji_debejilowed.pdfIn PDF document text
    • https://juludonidodag.weebly.com/uploads/1/3/4/7/134706402/5418370.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/jedogumi_kabuvaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_6060bff836168.pdfIn PDF document text
    • https://bisawovetazevel.weebly.com/uploads/1/3/4/6/134613631/vogirax-samiximaritef-kogupoxo-seduwa.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/lebiz.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/5972746.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/45fac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421352/normal_5fed9c92ea842.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://mulasamesi.pbworks.com/w/file/fetch/144501051/namaz_ka_tarika_sunni_urdu.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/76472974343.pdfIn PDF document text
    • http://palejemevat.pbworks.com/f/47016767202.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/download_aplikasi_camscanner_premium_apk_mod.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/domain_search_shopify.pdfIn PDF document text
    • http://fufitan.pbworks.com/w/file/fetch/144634587/streaming_fast_and_furious_7_subtitle_indonesia.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144424812/welajexaze.pdfIn PDF document text
    • http://zapibibilubo.pbworks.com/f/carranzas_clinical_periodontology_13th_edition_free_download.pdfIn PDF document text
    • http://jumedew.pbworks.com/w/file/fetch/144688935/87684706946.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/water_pollution_biodiversity_and_biomagnification_webquest_answer_key.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_off0001b5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5AC 5584 bytes
SHA-256: 8d9cae91afe243960bf18c36653a71e23b30ca33ea92f99157a9bfe617a9940e
font_01_sfnt_off0001c8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D5 12156 bytes
SHA-256: badd1fc2c2e59736ac214f42db64330dc2b7d0cd00707bfcb19a2aee49941ea7
font_02_sfnt_off0001f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F203 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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