Malicious PDF — malware analysis report

Static analysis result for SHA-256 170eb1a2816fe7ff…

MALICIOUS

PDF

91.7 KB Created: 2021-03-09 07:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1381460f9fd9af319052390cdfaf3afd SHA-1: 1484afc59405d87f2702f2c60853eb529665c2b9 SHA-256: 170eb1a2816fe7ffc561ab39013a1a6d9558e0939123b645d4218ec80c8d0874
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/award?keyword=artikel+akuntansi+syariah+pdf PDF link annotation
    • http://reactivascotia2020.com/10900925680mb35p.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/jjdSmje/blackpink_piano_tiles_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/2BhjjcB/befigujijubikukupized.pdfIn PDF document text
    • http://i12tws.website/what_does_dark_color_period_blood_meanhzn0q.pdfIn PDF document text
    • http://euroshopme.site/blackberry_android_mobiles_2018cos0v.pdfIn PDF document text
    • https://cdn.sqhk.co/davunosedepa/fuigigJ/castle_jungle_world_run_2_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/iegihbv/friend_finder_iphone_7.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://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_2277be23708945c98e02cb221b0361dc.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_5a96c681de42457fa564bd389139caa1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad80b934-ef1d-43ab-ad7d-0157589b9f86/dugozaxosigin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b483bac2-befc-4c3f-84bb-3a1e2e76e584/jiresixibo.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_992ba6b1aaf64cc5a2151276ce54ede0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/51337911545.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_0d2a61eb860e486e9f4201eaed296c7c.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_ae62eb2ef81846e894306c967de5eeca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46fe829-cab7-4d8e-b531-558ba1b75af8/hp_elitedesk_800_g1_sff_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/langrisser_m_reroll_guide.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_7fafbf41fd614b3e8298fe0b169939e0.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_327ff96758b54e28be30b0256f8eef2a.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 3104 bytes
SHA-256: 51eca7835bc6f762c646adbc88fdbad8686a5134a1f5c277d7385dbb3c3b6d79
font_01_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 5056 bytes
SHA-256: db1cd08edf59f705484e790a4c62aa8eac89a4679c79023ae159a0e8111650c8
font_02_sfnt_off00010d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 10136 bytes
SHA-256: fd2222ec6185a29e7922b8d272cc03cac43356bfce63231eb1b39c5ac2a7824d
font_03_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 20084 bytes
SHA-256: c9317d0acbc922db7287cc6e49a8f1aa110e010434dd4291a3c2f6a8b72c341c
font_04_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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