Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d242e8276f37ed…

MALICIOUS

PDF

78.0 KB Created: 2020-12-20 22:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9904038dabd0358c98f1dfa3f982d955 SHA-1: 838e78eee8f640ab0dc355e7baf3502cc0bb8148 SHA-256: e1d242e8276f37ed269a11a9fcf6c1a7a242b307d7e6c66459af83be69ab297e
214 Risk Score

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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=it+sector+in+india In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f9fd24e2761e.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/lasumuka_zojilojufeni_nukamidoriral_zilerogiwune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5faf47c625339.pdfIn PDF document text
    • https://vutefurawo.weebly.com/uploads/1/3/4/4/134471077/8513971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_5fbb5527a2957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5fa2ccc96eddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5fc1619cb40b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_5f9f44ed7bf55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fce7ddae4f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_5fc2aad09addd.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/c43de7d1-c981-431f-aaab-0f5ff0860f5d/eastwood_rust_converter_paint.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e907ec917750a3f1629c/t/5fd0b6b38f1ddd5ccbe3325f/1607513779785/live_video_call_online_free_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f02f9a-d9e0-47b8-ae3c-120baace0e04/software_systems_architecture_2nd_edition_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6f486791da6493f678260/t/5fca73518e8fba586e5e7bbd/1607103319012/marketing_strategy_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec60c7ef-d1e9-497c-a531-57112bda1272/82795890654.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_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 4836 bytes
SHA-256: 909f231bc36405111c641e04c97d18bed4f7f7c43e2e51d3107227b832e449de
font_01_sfnt_off000104f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F6 11148 bytes
SHA-256: 7b48993b797db299d92c2af5c0df9f71ab1e2b7f6c08ae749a6430dc43c71799