Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb36fe5d2eddb9e0…

MALICIOUS

PDF

79.2 KB Created: 2021-05-06 13:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1e7ebdda85feb6927a1654020c0521f4 SHA-1: 54ee191ff63f0f98ffddbac74f992b3ce1dda0ae SHA-256: bb36fe5d2eddb9e0d40db903ffe2cee3b12edf9be8acf0f1b2569f1bc55b2655
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 0.9996

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://jumiwimov.ru/strik?utm_term=master+of+the+universe+comic+book PDF link annotation
    • https://cdn.sqhk.co/xamozafi/cEgdmgj/3217869722.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/veruzizabuxaxubojub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_601236051ff6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_601af734319cf.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/W0MoSBk/zanali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fda4a888f324.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/21939302568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_6066d4f2b45f3.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/kifutizijebuj/fireproof_love_dare_book.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_9e88c13af6014a8ba3713fab139c25eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7677a7d-1a30-4cf5-81c9-d203a86a22bf/plantronics_backbeat_fit_350_wireless_bluetooth_headphones.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_67a9aca1df594b2588ac3e365de97dda.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_df67b347509449b5a1cb568bb41e5406.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/jezojexipevatisoxanukokam.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/fiddle_sheet_music_violin.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/dalalekutinuwor.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_5844dde6939c4587b0e18b2e7688f357.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/3091667362.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/26643467748.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/on_the_incarnation_of_the_word.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_32f1c53eb90b4a2f901311e695e5c0c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc303963-6689-42a1-bed0-a0f24daaa887/rewozumefanawovigexokumo.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_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 5360 bytes
SHA-256: 34ecdc41163d032e9cdce6dc0547f2b88b891716029870a5973b5aa93ab76eaa
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 11268 bytes
SHA-256: e1e28e3f1e39ecdde434cfbc569bd7797121fabbf7bee215da58b0c875bc22bb

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