Malicious PDF — malware analysis report

Static analysis result for SHA-256 3146dd4dd38f5d89…

MALICIOUS

PDF

73.9 KB Created: 2021-03-31 06:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9eae2794f4ccd09797b38feefa9b0c64 SHA-1: 90e7643ecf857a3150ca7c05fc9090c8073ebb39 SHA-256: 3146dd4dd38f5d89f1c2e1ede2f0951e182eac0499eba60a7868bc521c4c9bf1
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=johnson+matthey+platinum+report+2019 PDF link annotation
    • http://dupamineni.medianewsonline.com/epidemic_endemic_pandemic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464523/normal_5ffb94d12b6bd.pdfIn PDF document text
    • http://loberas.22web.org/2019_calendar_uk.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/project_budget_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451369/normal_60503f30ce7c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_52c4a0ea440749be8fc563c2d7327705.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/49264423868.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_0e69ce9d5184468da73719488ff8a752.pdf?index=trueIn PDF document text
    • http://mevuxuru.atwebpages.com/rational_combi_oven_manual.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/69938379058.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_0ad384e84ff149a8ae6bc8a3fa15b5eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/inductive_reasoning_test_with_answers.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_656e3e70e368429a88f0984f8348b8fd.pdf?index=trueIn PDF document text
    • http://zekarevuwo.epizy.com/cuddledown_german_flannel_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/94317592261.pdfIn PDF document text
    • http://segixof.epizy.com/aventuria_bestiary.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_a8fa434d00464c27999b71bcae5263c5.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_64749b85e1ce42da9137dbf7338852ce.pdf?index=trueIn PDF document text
    • http://xegilejefaga.epizy.com/kofatitarugimewolagos.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_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5632 bytes
SHA-256: 282914ce6a0b8159ed8292eb8cfeecd4338ca5e40d95394724391096ef2ca119
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 10868 bytes
SHA-256: ea28761d6c2c9f8fdccc1db6a3c022e15b57370dbd419eb57dbc7d2bde0783d9

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