Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bd3e4ff3a68876…

MALICIOUS

PDF

68.0 KB Created: 2020-11-22 10:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 941955eb7e6f94084e7960d02e3eda5a SHA-1: d28aaccff7e13629e87f69b3eecb874ccc5716e0 SHA-256: 97bd3e4ff3a68876c79792f37afdaa388176d27b74f569141f3c631ec51cb4b4
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://trafffi.ru/123?utm_term=building+scalable+web+sites+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fafa4dd7138d.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/rajojul.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/4916972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f8c5d75f3f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f87380717cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fa7bed0036bb.pdfIn PDF document text
    • https://fuvafejozogixuj.weebly.com/uploads/1/3/4/8/134878931/temonuxemon.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/1602674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fae6d3f0b719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fa946be2cb8c.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/6f79e280-21b2-465b-a620-1e110fdb5196/93987139002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e48d47-6b59-4330-9cb2-33f07238a66a/roberts_rules_of_order_barnes_and_noble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ee4692-bc12-4436-b566-fcba38fadb83/need_for_speed_most_wanted_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85508a4-43e0-467c-aa71-179ac70d0163/rwby_russel_nebula_fanfiction.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_off0000ca84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 5508 bytes
SHA-256: 04acaa2d5a50093aacd13071a8282003d303a552426c5d39add57952823fd681
font_01_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 11228 bytes
SHA-256: 6551cc68fcd9d12a42f0956b5671f44df0b8279806cf46cc159e708e9b7db45a

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