Malicious PDF — malware analysis report

Static analysis result for SHA-256 3887c5eb9397682b…

MALICIOUS

PDF

83.6 KB Created: 2021-04-01 12:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e9b1cbc67c1bd432041ead714758c137 SHA-1: 8916d3849bce0bd483dbf3ccbbaf9a757a61954d SHA-256: 3887c5eb9397682baf4c2825b42e993b0192d7f0fadf412da153d291bd10931d
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 0.9998

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://dafemum.ru/strik?utm_term=2018+toyota+camry+se+for+sale+florida PDF link annotation
    • http://zuregazezoral.mygamesonline.org/wadapafenukowizifipib.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/basidiomycota_characteristics.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/why_marx_was_right_summary.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/tuvurununoxefapukotasirog.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/how_much_time_does_it_take_to_fall_in_love.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/autodesk_inventor_professional_manual.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/honda_eu2200i_bluetooth.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/star_trek_beyond_trailer_plot_twist.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
    • https://uploads.strikinglycdn.com/files/fe04d944-3da5-440e-a1bb-37b87f858d67/2006_ford_6.0_diesel_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2edab04-0e63-4eb9-afdb-063ab4a2743d/bekomopavazogovusokeno.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/what_are_examples_of_social_phobias.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_9959c5e826714f789a19c7532ab2b975.pdf?index=trueIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_804a497a42c44c9c8cf00979f39dbbc3.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_18f3e567f8ee4dcbb035ed1ced40067e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cc9851-fc92-4779-8e73-828b3ef87ca8/princess_diaries_2_castle.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_673024e31cb04c7899b49a042dde8d3e.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_998811400c2743ee969795fd40e7092a.pdf?index=trueIn 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_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 5376 bytes
SHA-256: 92b5d78cdb114bdfd68eac60d14e6936157280c26742c5c481019f9df29cd6a9
font_01_sfnt_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 10600 bytes
SHA-256: 993b5221711d05e8c4ffe7b9594dbda9daa0f578ef62f9278539a0dc243a6789
font_02_sfnt_off00013305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13305 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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