Malicious PDF — malware analysis report

Static analysis result for SHA-256 3346d882fe5345af…

MALICIOUS

PDF

73.5 KB Created: 2021-04-18 06:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d1a2ac8d435fbed641131f204bef941 SHA-1: 71a9ff1cdd2d6d3f4ae4e8b16a10c10332a5c4a8 SHA-256: 3346d882fe5345af03dff153941959161578a92097628607f38f5aa69498f721
186 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 0.9998

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=old+school+runescape+gold+amulet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530990/normal_5fe9d29ca2fbe.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/gofipureju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_604f58aa5cddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_602aaadc12d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5fd9ca6483a43.pdfIn PDF document text
    • http://wowovamofuzo.sportsontheweb.net/ansi_sql_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_601ecbba717e6.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/4ff844e4-a85c-4791-8f08-ed7887cd968e/ultegra_di2_groupset_disc_ebay.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_4b2a68b06648447584405c5fe19683c7.pdf?index=trueIn PDF document text
    • http://tanarodo.rf.gd/xidibififoxutedofoxotafa.pdfIn PDF document text
    • http://tolelagegovoz.epizy.com/31693735833.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_1a8613683a414bc9a7701f091a9dbc24.pdf?index=trueIn PDF document text
    • https://1144d920-b655-460a-9e18-e2e21d63b765.filesusr.com/ugd/3283b0_f9ad12a11f0948cf9da3ced483a91c09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abcef9a-6829-4d80-8d1c-85ec75a380ca/what_is_the_definition_of_visual_representation.pdfIn PDF document text
    • http://xezogime.epizy.com/1375492481.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_9ad69c1da4c94926943c67f81a9b29d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd55a4d5-3073-44a7-b6da-fcab04179f0f/60934141724.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/zejelesofatomovizenaboto.pdfIn PDF document text
    • https://af8e4364-7f8a-45ec-af3e-d69da1c27fbb.filesusr.com/ugd/12c36c_ed930cb2adf04929bb3a0290b30f93f1.pdf?index=trueIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE045 5516 bytes
SHA-256: bc41d4452d98acf8acac14f3edd2b9f6e0a84b61608c2fbd3a1f86ff3ee1f0a4
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 11272 bytes
SHA-256: 1a075fb1b390cd7b646bd10900a4e1c5f6571f4e8149a8021bb8484a9d9f644f

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