Malicious PDF — malware analysis report

Static analysis result for SHA-256 a710006f09b2889f…

MALICIOUS

PDF

75.5 KB Created: 2021-02-25 09:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c8b1832ce2083e537d0b91fb4052634 SHA-1: 57dc920c69635a43ea3e17a71b7ceb8eb4f30a83 SHA-256: a710006f09b2889f3d9c14ba0fbf720a9f5b4ea5c237ad5124595033df9dbe42
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://bologen.ru/aws?utm_term=ti+36x+pro+target PDF link annotation
    • https://moxuwurenawa.weebly.com/uploads/1/3/0/8/130874588/zawemuxobesuma.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/8662ea416d.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/jaAjhhc/shake_shack_burger_stock_price.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/RC1tsLw/razijewu.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/6229184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410717/normal_5fcd576faaa9d.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/riporawiwadowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403689/normal_5ff2fec8d7f15.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/google_maps_earth_view_satellite_india.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/roku_streaming_stick_plus_remote_wont_pair.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/ijgeLia/93923839237.pdfIn PDF document text
    • http://fowusurenizono.iblogger.org/1321486585.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/b7ea4318267e7.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/725357294.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
    • http://bitiwumit.rf.gd/students_comments_reports.pdfIn PDF document text
    • http://genorokotejivo.rf.gd/relative_pronouns_worksheet_grade_6.pdfIn PDF document text
    • http://vubefezit.rf.gd/legal_fees_paid_in_connection_with_the_purchase_of_land_are_1_500.pdfIn PDF document text
    • http://zinikifog.rf.gd/project_acceptance_letter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 4796 bytes
SHA-256: 8f734665f1d86dc46df88afc90cb70e85298c0bbf7999a515678999d740986b7
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 10888 bytes
SHA-256: c054fcd488bc1fe48677d8e5f2120c2ad9fb001f0a0e8cf5bf2bb2bfdb422997
font_02_sfnt_off00011184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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