Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b13c513348dd54a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-06 07:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0edcd5c1ef1bebb570095293e34c8f43 SHA-1: 1123bd178eac6e841376b363f065a647c66c1b6d SHA-256: 9b13c513348dd54a906d2bcc8237037f5316dd63ced279880a81ea3b3fb20376
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 0.9997

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://fokemale.ru/123?utm_term=how+to+turn+on+apple+wireless+keyboard+2011 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5feb0bc0b2c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5fd93b440b420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493890/normal_5ff8bb3dbf4a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_6008abf997cc6.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/chemical_reaction_curved_arrows.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5ffe584b783a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474462/normal_5fcf0ae0e2909.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/88802408732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_601ae3ff64a39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5fcce4ec587eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6041bb8a10dc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wemupajese/50705293053.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/kamudenu.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_37a1340623e64918ad8ff7e0424aa335.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/reset_g_shock_tough_solar_watch.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_7281a5e24aa04c7a853c7a5f27b45b00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/dofavobolewirigukob.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/vipufujaxaduje.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/1628511897.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/is_flavoured_soy_milk_good_for_your_skin.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/sharp_4k_android_smart_tv_58_inch.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_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5636 bytes
SHA-256: df56f9851a3b0f20f8679a0d6aa20db428cebb11687481dd1c1f48e64974edce
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 10420 bytes
SHA-256: 14461be088a12ba33e24acbe3c879e2079ccf8fdbf334da30afaa7ca2f29bed2

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