Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a9717f6ea72e1d…

MALICIOUS

PDF

110.7 KB Created: 2021-04-17 10:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d749d2ee95825bfbb6b53126a62a623a SHA-1: 57d897756500c4935e2f8c3ed81a06344d8479bb SHA-256: 08a9717f6ea72e1d1c23aca2a896fa3ae9a6a69fd332df5698894adeb1161330
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 0.9994

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://ponafet.ru/strik?utm_term=america+the+story+of+us+episode+12+millennium+transcript PDF link annotation
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/kebunigix.pdfIn PDF document text
    • http://xepomujix.22web.org/78110607056.pdfIn PDF document text
    • https://nagalijas.weebly.com/uploads/1/3/1/3/131398542/6683120.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/jojobavomexor-rulukoxoxi.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/c65b0c0e8.pdfIn PDF document text
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/03ab6ed37b9.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://s3.amazonaws.com/tonisefoteka/62096793429.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/getting_started_with_spring_framework_4th_edition_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0dcea9-ad5c-4e1c-90d1-6c88d109354c/808901928.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_ab572eacd0f148d0aef9a4eb8fd73278.pdf?index=trueIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_10ea419a5bcd42f38239a1e967dbcf91.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4eb9ec-47a4-4972-99a0-89b70d4d6999/low_calorie_items_at_dunkin_donuts.pdfIn PDF document text
    • http://nafivinada.rf.gd/ncert_chemistry_textbook_class_12_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7e1fd0-7b45-4656-9873-90efd2dfbf51/lg_g_vista_2_case.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/limavotup.pdfIn PDF document text
    • http://kirizuwapizu.rf.gd/fifezarosapi.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/how_long_is_harry_potter_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14fcd7f-0946-47ca-983e-800d77fa35a9/combi_boiler_heat_exchanger_cost_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78dbf2e-ffd0-4a03-acf8-fabb22cc83af/gimadad.pdfIn PDF document text
    • http://wuzuruwevirelu.rf.gd/algebra_questions_for_grade_6.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E05 12388 bytes
SHA-256: 575c6150009b5fdebab1c5e1067d2753e423d2dab4d5fe366287aea4d8822cda
font_01_sfnt_off0001670a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1670A 5552 bytes
SHA-256: e11a1ded80dfd1f1c5d2772a2438d2e3b5cf5a5e43e7a290d4c5120dcb56611d
font_02_sfnt_off000179c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179C6 10792 bytes
SHA-256: 06793d2c1c0ac9af44e5c505f15e82b3d0a392b6c5bb55fa440a4254fabec991
font_03_sfnt_off00019e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E2F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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