Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8e20b831df17ea…

MALICIOUS

PDF

93.1 KB Created: 2021-03-30 03:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1eeea0c5e82ba56034ddd54c87de1c5d SHA-1: 97e597d9993056e1c163419778a5d36e6c6e7ad7 SHA-256: 6e8e20b831df17eab39153445b7ab7991d6933ac489812ce769d0bb34e1ecea1
126 Risk Score

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 0.9992

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://fokemale.ru/123?utm_term=aadukalam+tamil+movie++dvdwap PDF link annotation
    • http://xapowuxif.mywebcommunity.org/blockchain_technology_applications.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/10691705575.pdfIn PDF document text
    • http://pudevivufug.22web.org/fivuxanidefejitu.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://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_8c5a6b5082584e57b7fccb1aa68e34ce.pdf?index=trueIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_69183d5c98a540859757a7f3be66a687.pdf?index=trueIn PDF document text
    • http://xusezoko.epizy.com/vertigo_physical_therapy_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/nujimuzizijun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d1d74d-64c2-49d3-b092-4e0437aaede5/5791192903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145db759-0f63-4fc5-a019-cc2eaf936f3c/how_to_get_a_free_psych_evaluation.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_82ff5a55f6484a10b9a472c246cc17c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/61141186383.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/jegixawevajagafe.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_028cf4d36e344f26b7ffe5da7af70600.pdf?index=trueIn PDF document text
    • http://xobibaga.myartsonline.com/nimisenukaju.pdfIn PDF document text
    • http://xezedif.epizy.com/11936348072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df7c874-2927-4e22-a6db-4ca40afeacdd/72968996230.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/jazitapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fb9526-41c7-45e5-8666-a9a47079f512/scansnap_s1500_operators_guide.pdfIn PDF document text
    • http://sujawusoxenum.rf.gd/32881802759.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/ffxiv_leatherworking_guide_60-_70.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_235d4435d5884752a219766838ea8c71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da60ddc5-8137-47b8-ac20-dee46ab36c56/julagatera.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 4812 bytes
SHA-256: 0699780030d4d32d31cf5337e9d43a920e2a61cb640b93ef538fea4e02312b9d
font_01_sfnt_off00011bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 11128 bytes
SHA-256: 574021dfc53b1579ed279c4ea8bf8264731e91f35a7b1d269932a6c8fece31ac
font_02_sfnt_off00014202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14202 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_03_sfnt_off0001571a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71