Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc8892c9af283ae…

MALICIOUS

PDF

86.2 KB Created: 2021-03-25 06:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31094afbd86c21d533142330628a8e63 SHA-1: 113005e126d9bae94e7987ff8a0d31f84d994ef4 SHA-256: 7bc8892c9af283ae7f8a674f021369cb843cc11169b6c821a065deef7a5351e1
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 0.9992

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://zajinet.ru/wix?keyword=back+to+school+supplies+list+for+5th+graders PDF link annotation
    • https://zuzoperelalame.weebly.com/uploads/1/3/2/6/132683259/4654655.pdfIn PDF document text
    • http://aydym.club/inotropicos_clasificaciontq81p.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/how_to_untie_a_necklace_knot.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/78496833990.pdfIn PDF document text
    • http://bupetud.xyz/linksys_ac1200_amplify_manualp4h6y.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/keurig_vue_cups_coffee_pods.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/9158032159.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/61163035418.pdfIn PDF document text
    • http://bulubuzigajuzar.getenjoyment.net/addition_and_subtraction_worksheets_3rd_grade.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/barisan_dan_deret_bilangan_kompleks.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/b9d4d81998b7d2a.pdfIn PDF document text
    • http://pezejij.mygamesonline.org/kizuwedidanaxujefona.pdfIn PDF document text
    • http://tehnoprom.org/piano_music_sheets_blankc9hiu.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/tazemokidara.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/niv_bible_study_guide.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/8664228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fcdbcbc0284a.pdfIn PDF document text
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/de63c7f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390051/normal_5ffecdfb4a24f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_604495684566f.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/motorcycle_diaries_book_report.pdfIn PDF document text
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/zumoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/2007_mercury_9.9_4_stroke_for_sale.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 5656 bytes
SHA-256: 4541b1f222f066795699ef822a7ee042e64bd40ec573af19e9c3e97081401747
font_01_sfnt_off00012369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12369 11020 bytes
SHA-256: 525f8612f1ff8a5b9bc84def081cd0225c03b2a1d4441bd1b2538aeaa3143b90

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