Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f415e84126aaff9…

MALICIOUS

PDF

70.4 KB Created: 2020-11-19 02:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cf731780888d91dd70ab1e44ba9fb49a SHA-1: d31cb68b7cf337a428d151f49af4d264307619b7 SHA-256: 9f415e84126aaff94be70d494c7aa586eacc05f50eed4ff13fd81f8a7e6d39ca
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 0.9998

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://trafffi.ru/strik?utm_term=loki+prime+stealth+build PDF link annotation
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/2b2448b5ee1adc.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/wefudesiwaxi_fuximapokar.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9210765.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/ritanu.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/sigobija/55799577601.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/19473392249.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/kisasulibugebimuzekok.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/change_chrome_theme_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/38016727324.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/verizon_mifi_jetpack_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6643cee6-fe9f-43cc-807b-2276425a4021/marorebikekafat.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/kelilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65170ef-e192-4fb4-862f-57972b44291b/tuwoperafakutomiwez.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/27371206451.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 5120 bytes
SHA-256: b79faa36b360cf3abca6d5d2a7fd09c23d76bc418be57b87bcfb060f3e1ebbff
font_01_sfnt_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 11264 bytes
SHA-256: b905ed1ea606591fe1024178cad4ca51cdb15d836b8aad66556c503d42213af1
font_02_sfnt_off0000fed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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