Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b2b56f70d40fda…

MALICIOUS

PDF

84.6 KB Created: 2020-12-15 09:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5aee76b82194617aef30d474bf435a44 SHA-1: 2773caf359278dd18248c276b7a7359d107824d0 SHA-256: 95b2b56f70d40fdaa2c7a72694e88415d46a2d7fbffbcf8d1785d7357ec71096
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-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://traffset.ru/123?utm_term=alexa+bliss+buddy+murphy+married PDF link annotation
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/kovew-gilodiji-sirubamuwajas-monopoxizenunoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f89707703770.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/946536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fd7f082a1dc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485329/normal_5fc3fbb462665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_5fb596ac17af9.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/xipujomutetasukubu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/744c75e6-19de-4008-8fed-fa5024a0b7d3/98131055494.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e190e9fc3622d52207ef/t/5fc81fa8dcb5b260796f4b09/1606950825535/43077865576.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b6fdf132613bbc7a91a/t/5fd1329c634dea75b651b573/1607545501539/zombie_day_of_the_dead_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d52020a-049b-4931-b5d4-f3ec7a76fe91/it_project_manager_resume_examples_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc783a843c5ee75bf2ca75b/t/5fc9e2679bc93d20d9b11bbe/1607066216477/65904730081.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc283e75bcb0228a28ca719/t/5fc59f935147b14804f45a9a/1606786963755/project_management_software_requirements_checklist.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52ccbcd1e280355effc06/t/5fcf3f4d0ff3944fc556668f/1607417677637/turn_off_emergency_weather_alerts_android.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_off00010d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 5496 bytes
SHA-256: 760cfc8522c778550ded4a9d87456610d048dd12f095bc69976f454c1d0e11db
font_01_sfnt_off00011fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCF 11004 bytes
SHA-256: 754838abdfe9f999c4a07b42322c0f5ba3e974b5e6591394d28793eed4663862

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