Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe4ecef632c0df2…

MALICIOUS

PDF

43.1 KB Created: 2020-10-29 12:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5f1532d5a90700db02aec85b034ad959 SHA-1: 4343c473985153a257e9ca5e62b187ab573f7360 SHA-256: fbe4ecef632c0df219bb2b807bd665d88337ec83bf0fa5e1490f243d6b824647
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Cheiro's guide to the hand'. The presence of a link farm heuristic further suggests malicious intent to direct users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/aws?keyword=cheiro%2527s+guide+to+the+hand In PDF document text
    • https://zipalusub.weebly.com/uploads/1/3/4/3/134343211/8030008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8bf3042cbf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8af28577e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f8b77de305c6.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/a552408ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f964ec0a26a8.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/paxivogedewilu/xofefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525a2b5b-693a-4223-85ea-7ce479a00900/30621741844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1239/7507/files/entry_level_1_functional_skills_maths_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba0757a-cac2-4fde-ba9e-453b12ee25fb/90739098751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ec794b-586e-402e-bf3b-9c234d0c49b6/foxit_printer_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108dfe4d-adcb-4107-9422-e7748ac698a6/govutaxorubuganevolerewod.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/97569679740.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/72955974982.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/59738177212.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/33826858902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275edf40-4486-41f0-9752-8b530f5f9ea4/69092335404.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_off000067bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BB 4996 bytes
SHA-256: 455b7efbca8b1590e455ce3cc782d0e9cb340fe7c153dfd102725f0d82d89abd
font_01_sfnt_off000078ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 11884 bytes
SHA-256: 1623acaf777b96754a0678bb40f4b0ef752058c3a1480fa2a93ff7104ebc1c47

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