Malicious PDF — malware analysis report

Static analysis result for SHA-256 083ff6f96dad21aa…

MALICIOUS

PDF

68.8 KB Created: 2021-03-13 19:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73b7748c84207fef3f0ba64427b519a6 SHA-1: 1214b7b84671355283c331af0c692f7335110990 SHA-256: 083ff6f96dad21aa30de3371b6a2f8f44ad962308217a0e7cfa01a58be145bec
186 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 6

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=blue+goose+bakery+st+charles+il PDF link annotation
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/1754173.pdfIn PDF document text
    • https://ginamepi.weebly.com/uploads/1/3/6/0/136024017/mewakovad.pdfIn PDF document text
    • https://bageriwiko.weebly.com/uploads/1/3/2/8/132814239/pobelukapil_betar_kemedokaz.pdfIn PDF document text
    • http://vaworudewu.iblogger.org/liluwogegifij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_6044cdee4f853.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/5872477.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5ff2ff4099016.pdfIn PDF document text
    • https://xulijuba.weebly.com/uploads/1/3/1/1/131164032/4329533.pdfIn PDF document text
    • https://revininone.weebly.com/uploads/1/3/1/3/131380081/1373459.pdfIn PDF document text
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/baa75d065.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/ronilemafubube.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/somebolijorof_kutufadavoz_zixodokiw_sorera.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/4598267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_42fa12ca7288418d8aaab7fd9f0b6c2e.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_b0b9d46667a44358a8f4b4c885af4cb6.pdf?index=trueIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_e2fc694a304e42b29dc28cf624ec2830.pdf?index=trueIn PDF document text
    • http://posopikepikan.rf.gd/speak_the_graphic_novel_by_laurie_halse_anderson_and_emily_carroll.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_961788f375c546bfba58ea1e3baaf353.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_d7659354f27240959eb48b31f87be0f4.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_f0bbd3e6de174cf98c212f3f0c13111f.pdf?index=trueIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_1d010b9cb3a24956885c1acb6788bcc1.pdf?index=trueIn 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_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 5416 bytes
SHA-256: 6aba8fbce47c936d4aa22a42d94f530293107f9391486a74cc6feaefdbfd35fc
font_01_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 11084 bytes
SHA-256: 7afab8de405a0121c755ff972b780e611411ece2cc46acaa5b3dcca98af944c8

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