Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d7fce16f754a83…

MALICIOUS

PDF

81.3 KB Created: 2021-03-22 11:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1f31b099ac045f20f6f2ced1582850c8 SHA-1: 5bd511113718459f3cd4541da2c0a46d3dedf9b8 SHA-256: 70d7fce16f754a833e409b049a95896bfe526f1133e155bcd8e07ca0b4845b9f
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-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://lozipotod.ru/strik?utm_term=profusion+heater+quit+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386361/normal_6050cc9f55364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd9a42c90183.pdfIn PDF document text
    • http://prodson.fun/26049695952hnuwx.pdfIn PDF document text
    • http://scandisvet.ru/enchanted_forest_colouring_pages_to_printi7bna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495390/normal_6022df9207d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_601b67efcff5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_602dcff7ca277.pdfIn PDF document text
    • http://yourdesk.website/jkbose_practical_date_sheet_2018noz3u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_6052d29e18bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_600fcab78969f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fe7e884e200e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_6030e6331a241.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/how_long_is_the_8th_harry_potter_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23716287-85d9-45cf-a113-c121f8d51521/28508802642.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/42248306435.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/mobokevunemuduninidukema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914c7e68-ca03-4412-9efd-c6d1ccea6bee/14948981422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e40be7e-6396-4539-bece-6c4e47b7114d/gosadu.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/reflexin_sobre_el_mito_de_la_caverna_de_platn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3580fa4-98c4-4922-ba60-b3239874ab0c/tafheem_ul_quran_english_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8267a7-57f3-4ed1-9b1e-7d56a2932a5f/19237093420.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_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 5280 bytes
SHA-256: c361e214b31f9260938d1eaf814abcff69071f5933f40e5a50b4dc75d098f727
font_01_sfnt_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 11056 bytes
SHA-256: b67730edea76f63ebd06aee57d26527cd4217716069f5c17bee11e705b28b6a9

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