Malicious PDF — malware analysis report

Static analysis result for SHA-256 b730dd0e240f5340…

MALICIOUS

PDF

119.4 KB Created: 2021-03-31 18:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e1f42fce7e0e9696a89c32d5b23771d SHA-1: 5b36112cdaae71998b8c5b4b823e58d21c2c3ca2 SHA-256: b730dd0e240f5340c7b9e29acc8e98f2250799bdb0901955fd3366167a65491a
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 0.9996

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://dafemum.ru/wix?keyword=directv+hd+receiver+manual PDF link annotation
    • http://vumajuzatijerak.getenjoyment.net/peter_d_kaufman_net_worth.pdfIn PDF document text
    • http://aires.fun/guwosinp0k60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fdb56011531b.pdfIn PDF document text
    • http://nawabopebi.iblogger.org/wifaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_605ab80713096.pdfIn PDF document text
    • http://tomiwaze.22web.org/zavozefurimexamanir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485173/normal_6042fc128883c.pdfIn PDF document text
    • http://aydym.club/2504467500j1olw.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/zixoxidabipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_5fd7305a9490b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5fe49f9cb8ece.pdfIn PDF document text
    • http://gisowutuxa.22web.org/xujotidej.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
    • http://javoxowixeb.rf.gd/nejeb.pdfIn PDF document text
    • http://famirafopuremu.rf.gd/76695250408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366ec92f-1efa-4ee8-a3e9-5e8eece2e372/sulixakekonoregebumare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840d6897-fe8d-4a9b-af9d-102bae7a4073/61050455523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bfc267-0ac9-4cee-aa54-255004143ca6/another_word_for_solutions_oriented.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/solaxewarejefi.pdfIn PDF document text
    • http://kugefosames.rf.gd/gusitita.pdfIn PDF document text
    • http://gokemebazeroxe.epizy.com/rosojejidofufozirowek.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000172ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172AB 4832 bytes
SHA-256: 1d80caef49fa583a3155ea049c0c40974294fafd4caf8c7266e317419b4b4f39
font_01_sfnt_off000182eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182EB 12120 bytes
SHA-256: e1745eb5060a8cc4acacd78547468c0792d5974b6c3e71fab7b9c8aa3365ec0d
font_02_sfnt_off0001ab9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB9A 16292 bytes
SHA-256: 091c4394e49c5bca7c737e71546cbd254c4eccc8a702a6b1fb00d36b4c8edc2b
font_03_sfnt_off0001c0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0DD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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