Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6a3bca0d399c68…

MALICIOUS

PDF

91.8 KB Created: 2021-05-29 03:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: abcc2277fe75ecb25011c2d612d15da1 SHA-1: 104a8f650e4440c9fca68747094d985b4b8da3b9 SHA-256: 2b6a3bca0d399c684eddb81d8f4d62e3d23e17255481430b8d743af04b3ae21a
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 0.9995

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://vilenefex.ru/123?utm_term=report+twitter+user+to+police PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413111/normal_60571c42685e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371505/normal_5ffe81b804b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_606d14342f11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6022dff57cd4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_5fd5f9a83be6f.pdfIn PDF document text
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/b7c25621c4388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_5fe756fb16c74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470839/normal_5ff57e2ddf5be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_600e48da0fc8a.pdfIn PDF document text
    • https://repadugudemi.weebly.com/uploads/1/3/0/9/130969496/4082585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_6031f30b526f0.pdfIn PDF document text
    • https://tonavibete.weebly.com/uploads/1/3/4/7/134748981/3338472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_605d7c73e4c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_6035939d5030e.pdfIn PDF document text
    • https://daxeteven.weebly.com/uploads/1/3/2/8/132814811/9917419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_600aea1bda166.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/8e2543b3-34d4-44fa-b75e-923eab7872ca/vikanunaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b9ebb1-e006-40ea-857b-937e948b7c72/33618006814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8230e958-783f-4b72-ae6d-db2770c06f19/netgear_wnr2000_max_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2188657-93ac-4c4a-b3d4-a80229da1967/how_to_make_money_with_commercial_property.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2a6545-1a5c-4a31-a9af-a27cc991c1cd/73636367405.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 4816 bytes
SHA-256: 8e0c3d37d6df8b912e01582e17170ad7c0be5c99995063035f8e3fd8fb0de2cc
font_01_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 11944 bytes
SHA-256: 5f0bb66184272f4d9f70de6fff823cd23406cef359a00dbb1ffd7bfaa80ae7a9
font_02_sfnt_off00014c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C23 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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