Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be342733858c153…

MALICIOUS

PDF

84.2 KB Created: 2021-03-20 07:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dbe8141bf39e5b5bc66581bad87fdf79 SHA-1: e2ba68b2680617d962b2d4070c5fc72ca94d957f SHA-256: 1be342733858c153381a0c683d4cad6e4abb346bcc0a1d334a979fa4cbc096cd
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=costco+visa+benefits+guide PDF link annotation
    • http://intekzafast.online/which_english_accent_is_easy_to_learnpsh43.pdfIn PDF document text
    • https://vexikolilugurud.weebly.com/uploads/1/3/1/3/131379290/8216070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_602461adb243f.pdfIn PDF document text
    • http://hookup157.online/jaxefep6hcfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_5ff2b49ee5865.pdfIn PDF document text
    • http://idealica-official-it.website/wekevujosokabetora1idl4.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/lizadotamunekamis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5ffba8aceaf4a.pdfIn PDF document text
    • http://pelistens.xyz/61578592856jasqa.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/de75144b5ef6.pdfIn PDF document text
    • http://filanion.online/peraxixujapawagupuczqv.pdfIn PDF document text
    • http://ourfanz.com/10220457971b0anh.pdfIn PDF document text
    • http://hiziryigit.online/rental_agreement_form_california7gmft.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/dibedamoka/30118981244.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/kokit.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/dead_or_alive_4_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/watunilipewoma.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_72349799cef4443db7561849c0c0fbd2.pdf?index=trueIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_5731c353425e4e578bd3bd6087b35807.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/canva_premium_apk_for_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5164 bytes
SHA-256: 34c513a09dfb1075ac932d52e24364e31ebafc4c4032d9879441537b90b6af62
font_01_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 11144 bytes
SHA-256: 5464aa99a7d35e49cfd77ac8859995ebce01b45c376d785c93f46853160958f5
font_02_sfnt_off00011f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5E 16232 bytes
SHA-256: cb0239a5e77cb37740da0b4997a5f47117ed526887f952b298c44ef8b2f17e18
font_03_sfnt_off000134c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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