Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f5576a5e073e8f…

MALICIOUS

PDF

75.4 KB Created: 2020-11-14 22:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7b9a332d37b3e39621389ac7ae713d3 SHA-1: 9329602f3038a6884d04d66e6642f7b304a4c652 SHA-256: d9f5576a5e073e8f0e4deaa310d3fef53986e386804a78db82d6640aed53d7bb
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://traffking.ru/123?utm_term=zoo+craft+mod+apk+new+version PDF link annotation
    • https://sokifavobal.weebly.com/uploads/1/3/4/5/134514189/vofemopukudaba-nufasogivag-vewat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5f8b5d7930297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f8b07908d306.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/4324830.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/sisexukafarati_doxibej.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/138901b6f3f0.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/7904096.pdfIn PDF document text
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/danuga.pdfIn PDF document text
    • https://jajigasusugase.weebly.com/uploads/1/3/4/2/134234637/wodowurirek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f9ed2148041c.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/xisefowu/tumugijuvutefujegemarumoj.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/18642290171.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/zikuxewalivojukajem.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/ravonusovibazuvabubivita.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/89987406168.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/mippa_agreements_for_dsnps.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 5440 bytes
SHA-256: a7d3714a889ee84a9d230c0cfb309688a5b2aadee07e6d888fb4665cba559de2
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10096 bytes
SHA-256: 8342152bef34b1ab40e6b5dec201a04867348074134f1c290448d7737fd2d0b7
font_02_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 16272 bytes
SHA-256: 7e3c665d02ee0a48e1923e1b8a614f2fa6b15db6db37b38eccd0bca32143fa5e

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