Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b8a14e93ccf400…

MALICIOUS

PDF

73.7 KB Created: 2021-02-16 03:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f5ef2c8056d41818665840684b123c62 SHA-1: bae02dc7f762019832686cc02faa70f8e470a07b SHA-256: 89b8a14e93ccf40079617a943e133ec24feaf86b899e41ae280ea7f09a7b5e45
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://seumenha.ru/123?utm_term=lyrics+when+i+was+7+years+old PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374196/normal_5fcddd2547799.pdfIn PDF document text
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/zilipup_gazewubabowupu_gujusupudo.pdfIn PDF document text
    • http://tryplafond.xyz/maven_setup_in_eclipse_toolsqaw4omw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_601fe936420a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5fd7a28866ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462993/normal_60234f167efa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5fc5a18079927.pdfIn PDF document text
    • http://idealica-ordina.site/griselda_records_logo5h9i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5fdc172fbe8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_600bd1d7c24ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_5fc594458af5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5fc9e7f68b055.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/mozirolinitaje/call_center_scripts.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/lebufamafaniju.pdfIn PDF document text
    • http://ridupokibi.epizy.com/best_free_compass_app_for_android_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/92755273611.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5244 bytes
SHA-256: dd25504a8278471d1cf379b6339f02f94113f335c96f5b6db6d7ec3f921e1ec8
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 10760 bytes
SHA-256: 76ceabc763b286a4ff1327e9c64941b96fa1a75394f03a0164c82fbb4a34e7b8

Open this report in the interactive analyzer, or submit your own file for analysis.