Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfdf70632058e75…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 11:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fdaa66a4ee15ac71cd736713e77d4da6 SHA-1: 9ccfbc65160e24f69b6090eba0f1f2ed7ad9a887 SHA-256: ebfdf70632058e75b524c9ad05b0212fb2115efaed3abe7d4a6749df380488fe
186 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 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/123?utm_term=colloquial+words+in+english+pdf PDF link annotation
    • http://budokudepa.scienceontheweb.net/is_the_witcher_3_blood_and_wine_worth_it.pdfIn PDF document text
    • http://italiahot.space/modos_de_produccion_economiabc9ch.pdfIn PDF document text
    • https://xemexetizepe.weebly.com/uploads/1/3/6/0/136094173/3f111.pdfIn PDF document text
    • https://dodizavezoku.weebly.com/uploads/1/3/1/3/131398251/xexareletizupof.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/94537510132.pdfIn PDF document text
    • http://naturalm.space/bibetiduuoyox.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/biladaf.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/stock_market_open_tomorrow.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/1999_honda_accord_ex_owners_manual.pdfIn PDF document text
    • http://just-gopro.com/surah_al_mulk_full4orcz.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/xaziledigege.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/gexukafosekosaruje.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/2019_lexus_rx_350_f_sport_lease_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/hp_officejet_6500_troubleshooting_ink_system_failure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4fceb4-4833-4b55-bf29-29e88843084b/33377031363.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_6f6d0182442d424d9c8ddf076ac60665.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/615e771b-f7ef-4b51-9daf-b98b3313d485/lg_revere_3_sim_card_location.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_a93db2396b84401aa72cba4436a124c9.pdf?index=trueIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/certificacion_leed_puntos.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_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 5428 bytes
SHA-256: 6fbfcda52b78e7143b45de9c46f8aa2d051ffeb8b27e67ab8f9c54d17b53fae7
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 10616 bytes
SHA-256: 0335dcfe31084e9af264ea99564fc35376a0737bcb92bce1c77a394f662a680f

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