Malicious PDF — malware analysis report

Static analysis result for SHA-256 918284e1e1a70ebc…

MALICIOUS

PDF

81.1 KB Created: 2020-11-09 21:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af783bf8000c2e0425c36a658a211d4f SHA-1: d612da481de147acbbad1086cb023369daaf1286 SHA-256: 918284e1e1a70ebced54c47894164a1537ecdbc6071a4f7eb12047adb0fa5649
214 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 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 0.9995

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://ggtraff.ru/123?keyword=super+bass+portable+speaker+manual In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lonevu.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/xefonatigukevep-metagijom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9f2a79c5-4475-4135-bad3-dd0610c5e7af/vixekuzalirokazimozof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bf32c1-a978-4eb1-80bc-3b379cb5b0e9/xekokowipowurexefoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4124c8-861c-42f3-b222-1147bcb558c3/58873559329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f108ae7-8742-4c78-a966-1d2c8f5b4fc6/jubobefanisalesujot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe9c1ec-3178-43db-8a3d-aa9046987ab1/38939444403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc899c6f-27c4-488e-a4f7-dcb3fb071f03/kavupev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d06dcf8-25d0-46f8-aa71-7994d30c2884/how_are_work_force_and_distance_rela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdaae84-80b4-477e-a3dd-f87a885787a5/58504515908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a083713-9417-4b0f-aafa-4c6eba78f292/roxepagusolimununaviwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3801860-e8a1-4c81-ba3b-2cb12612ebed/72409087073.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 8208 bytes
SHA-256: 1164339c7efadb03b7b29e7d56b9e063a4e6eac580c37e8713b2d057a7fd0fe5
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 5108 bytes
SHA-256: 3dc59c930d495e9a89829c080eb91c4e764817627bb028ae17e9fe7937c3c93e
font_02_sfnt_off00010883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 9516 bytes
SHA-256: 8f422dd0c2d46c1773161d4d1042239ff8f73f9dd720862c494308bddc82b881
font_03_sfnt_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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