Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92b62b350de838d…

MALICIOUS

PDF

82.8 KB Created: 2021-03-29 21:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ac4d3d21b2dc16c6b1cff37d240e794b SHA-1: 5b2f2a1d2d90a2aef7b0054cfca5d271213175df SHA-256: c92b62b350de838dd25fc2128ca573c5fb3f3489dda5262f7f6a8604c18183d7
156 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 0.9996

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 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.
  • 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://kuzutuzo.ru/wix?keyword=pokemon+y+post+game+battles PDF link annotation
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/befabopesav.pdfIn PDF document text
    • https://zitidifomeki.weebly.com/uploads/1/3/1/4/131412181/956438.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/gesalubitevavel.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/80df6d19b775c06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_9fbbf107455044c290ee0cc17c544d37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/bengali_movie_online_free_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc0e184-b40a-4603-9fb9-6591e97926a2/92914810725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2432c27-f843-41ea-8619-324a5d0acd48/31461357877.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/araby_short_story_questions_and_answers.pdfIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_221fcf8e8e4645a6bbd65f09edcb6321.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/math_integers_practice_worksheet.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_2e9b40be5aa645dab6a772ade82f3119.pdf?index=trueIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_581df912c2934abdbbcee0bcadc0a309.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/xukog.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_98482bf4a5c64270a9132c373822c76f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7dc4e6-b1e8-4cb6-90b0-f6f13c07c805/how_much_does_a_wooden_mini_table_sell_for_animal_crossing.pdfIn PDF document text
    • https://ecad98c5-3f79-4b5a-9309-7060426a101e.filesusr.com/ugd/66ec94_e2b64efac85140bf837887db78de8155.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/luzoduvarobarulezeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/where_to_mail_de9_california.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_914e439852984a6ca76d0a242b622e48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/gibewanagavarazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41792a4d-1011-4323-8ff1-536f4468e7f4/tl-wr841n_firmware_openwrt.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 5348 bytes
SHA-256: df4fc3c540ea1484f9e4e63d298045f9a9a17147edfebabe6550ddb55a86acd7
font_01_sfnt_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 11884 bytes
SHA-256: db65553adef976fc163ac21d4ca4829b3d3730d984b7502c988a1158235d520c

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