Malicious PDF — malware analysis report

Static analysis result for SHA-256 93de3bcba0480917…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 09:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b343434e759ded60f9fe68d55ec1eeb9 SHA-1: 1d648f387ab8c7fcb8110d10bb892e54bcbfeb90 SHA-256: 93de3bcba0480917c11f0ca8d2c826e940b98a39af86096bb13e4b6938eabd0c
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://jumiwimov.ru/123?utm_term=lean+on+me+acapella+sheet+music+free PDF link annotation
    • http://nalobuberejiner.iblogger.org/79504713876.pdfIn PDF document text
    • https://xasizitip.weebly.com/uploads/1/3/1/3/131383358/2f88b914.pdfIn PDF document text
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/sinovuwepolexemume.pdfIn PDF document text
    • http://galajanexagaj.iblogger.org/75776255590.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/64880881725.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/reverse_dieting_layne_norton.pdfIn PDF document text
    • http://xadikefivo.iblogger.org/96755736505.pdfIn PDF document text
    • https://fosozofafeg.weebly.com/uploads/1/3/1/8/131856121/vevolav.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/4819657.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitivapudubidi.epizy.com/83887849439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57e8194-3827-4479-af68-6fa99250b49a/persuasive_essay_introduction_paragraph_examples.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/jawbone_mic_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0a9f15-d78a-46b9-8a15-2f66b0c4fdbf/what_is_the_best_bread_machine_for_home_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c8864a-e574-4a27-9334-70d668c2496d/32314366573.pdfIn PDF document text
    • http://kidoputuf.epizy.com/wirejoponaterukopobej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c00b1ad-20f8-4cfb-8089-ed1980b22248/mebazuzofiguxulowega.pdfIn PDF document text
    • http://fifusudevop.rf.gd/acids_bases_indicators_ph_scale_worksheet.pdfIn PDF document text
    • http://jenikov.epizy.com/sinarujifumu.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_off0000e911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE911 5196 bytes
SHA-256: f73e603ac3c3ae678f4da1ab423852ccd9032790fdc5f667085cb7483c1cdb1e
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 11840 bytes
SHA-256: 290712d4b7444046679729bea2efa00a85ae4f78af2e7dfffa67487f9c4b8a17

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