Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24e04a5424d3bf0…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 04:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ac5c118730c35ae2a2cdba7ce95e36c SHA-1: c7b74061e67d480794571f8b8b137ecd96ee4514 SHA-256: c24e04a5424d3bf00d986dfe6bd622d8d68412a16c8b07334b2332aa8a32ae7a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=how+to+draw+trees+using+pen+and+ink PDF link annotation
    • http://kepidurenomabo.22web.org/pitixezarureverubot.pdfIn PDF document text
    • https://bifotuvimutojuz.weebly.com/uploads/1/3/0/9/130969437/8c5360d684ea57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_601e5bca1f1ab.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/rumowivifegilatapegorose.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/78428592265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5fc75bd0be56b.pdfIn PDF document text
    • https://veranaza.weebly.com/uploads/1/3/4/6/134665567/4408687666f63f1.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/2449861.pdfIn PDF document text
    • http://kegolij.iblogger.org/automatic_control_systems_include_what_three_things.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5ff773eedfdae.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/tetuwoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivenoke.onlinewebshop.net/eureka_lightspeed_vacuum_4700_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05fc61a-8c98-458b-8c51-3a74a0179d6a/kogerititeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23657cef-4215-4af0-8ab7-e77cedbdddaf/23407815978.pdfIn PDF document text
    • http://polebofoxajiras.rf.gd/gogagu.pdfIn PDF document text
    • http://rimutapewite.rf.gd/nys_driver_license_laws.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/breathers_a_zombie_s_lament.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_5abb45f381044f44973157c102d494fc.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_17f159d5495846039ff0a227735893e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52757734-d4f2-470d-b0bc-277cbf6c753e/motorola_mc55_scanner_software.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_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 5212 bytes
SHA-256: 27c85a22c73955371252ac5b20e4cf60b9b44e1f12dc2212422e5d5c81cc993d
font_01_sfnt_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 10460 bytes
SHA-256: 42b01657300f9223c3769b4defe11c6df6b8ad21382ff3056e82ad52cf1c7b5f

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