Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d9a82209564acc…

MALICIOUS

PDF

83.4 KB Created: 2021-04-30 06:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a16b58d5809199f7f7921e0e19df11fb SHA-1: 11f2f24ac7f94c01ed2eea97f701527e5829b885 SHA-256: e8d9a82209564acc1ecbaaacdd3b18468edb6de54441bfaeb6b148da181dccdc
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-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://soxebez.ru/strik?utm_term=should+you+check+power+steering+fluid+level PDF link annotation
    • http://belofakomag.mywebcommunity.org/ser_bachiller_2020.pdfIn PDF document text
    • http://gigezojiradof.scienceontheweb.net/14221194427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_6067a34141fd7.pdfIn PDF document text
    • http://nozumupi.medianewsonline.com/ielts_speaking_book_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404976/normal_5ff02387267e4.pdfIn PDF document text
    • http://carishr.com/kuta_software-infinite_algebra_1_answer_keybqwai.pdfIn PDF document text
    • http://skidki-day.shop/amtlib.dll_crack_2018bokyb.pdfIn PDF document text
    • http://gufutaca6.xyz/33275002638nr1dc.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/tozakumuxufuz.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://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_aa7cb8d5e01e4e1b83a89a6cb654998a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9182929-0535-4d3a-a813-4c290069e1ad/jikapomawenibo.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_b721c93a036e4a4f9399914e34dfb55c.pdf?index=trueIn PDF document text
    • https://e2a3f85e-3ce8-4c76-99a2-e63219cad5ad.filesusr.com/ugd/473d25_f1956a5643a34b8da1410148d320f9d1.pdf?index=trueIn PDF document text
    • http://batapijas.myartsonline.com/rupef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b04d0d-8d0e-462a-ad12-2097f152d6c8/96779095189.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_2b2718e934a640f493bebe2365042cce.pdf?index=trueIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_03a5f514244144d3809ac3311d7e8470.pdf?index=trueIn PDF document text
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_c7a129da818b4095b9912af2d5f03a68.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_7c3c9656acd744ffa7e866620f424ad9.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_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 5512 bytes
SHA-256: 66453da8cd7a18c5dc5aaca486ad91cd68b24557a82fe763b7b632acaceb416a
font_01_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 10400 bytes
SHA-256: 42650cdd14a87a7a498a9741316bfa6e9016ce6b4af09ce9dc5ec6afe4be5eba
font_02_sfnt_off0001324a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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