Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27fbdb4876c9258…

MALICIOUS

PDF

81.5 KB Created: 2021-05-12 23:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa71d332a45276ac36c975c99ef5d166 SHA-1: b02d4d0f0e6c5c998f46df880996bf2746d1ad65 SHA-256: b27fbdb4876c925865d9e2aaacbaa72ef4b543ebd954cdf512caa710014e77f8
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=graco+ultra+max+ii+695+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376857/normal_60275f6aa5cab.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/2377935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_60683f486c13e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448735/normal_5ffda9a8f2f26.pdfIn PDF document text
    • https://zufitamel.weebly.com/uploads/1/3/5/3/135349526/vizim.pdfIn PDF document text
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/gegugarasuwuwigolewu.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/swot_analysis_annual_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_6004b490cf2dc.pdfIn PDF document text
    • http://vojamugoju.22web.org/megaloblastic_anemia_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60384f8201a77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_6036d5c562653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_606725afdd9b3.pdfIn PDF document text
    • http://gonakasuzoze.22web.org/ipl_2020_schedule_time_table.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_3b24a1dc9114456f92307f0797ab1d1f.pdf?index=trueIn PDF document text
    • http://givovuzozej.rf.gd/sabamuvoge.pdfIn PDF document text
    • http://wutivufugisev.epizy.com/philips_tv_supported_video_formats_usb.pdfIn PDF document text
    • http://juzuruwe.rf.gd/el_coronado_restaurant.pdfIn PDF document text
    • http://voxuluvaj.epizy.com/badminton_game_video_free.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_9685136943694ae59661ea168ee3bc52.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_65038a1f09e7456abd301293aa90fa7f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 5436 bytes
SHA-256: 9274e0ab724f0255bcfa7d96f823cfa65be149e6457d9b01cd884a950511de44
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 11004 bytes
SHA-256: 5773c4cc908ee47c4e33869be0c9962eb7aa1393f9fcf93291aecf003c46f4a1
font_02_sfnt_off0001233e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233E 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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