Malicious PDF — malware analysis report

Static analysis result for SHA-256 95150288b026f3b6…

MALICIOUS

PDF

79.4 KB Created: 2021-03-20 15:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 30663b8e7ed893e4b46d4edb0e13ec50 SHA-1: 2f090c0f41bb1cfcfe487b766b2f94d12fcc4180 SHA-256: 95150288b026f3b6d8c69ce70670cb347145dc0290e9dc2e8776fd0089ebefc6
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://crophysi.ru/aws?utm_term=dewalt+dwe7491rs+table+saw+best+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465402/normal_6014163eeb722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_6023e4552b815.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/kegikifelisuxeretol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_60511fd6656fa.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/52414784013.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/tozipubumajat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5fc5f44c6c37c.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/bcsc_ophthalmology_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_601e02c16d699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_6047eff951527.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/gosefej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_60436c4ca3e4b.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/63583797214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_5fd8c02a9b82c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejideba/cursive_alphabet_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/todem.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/gifaluxew.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/xozuzevavilu.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/elements_of_effective_report_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/wedivevazozamered.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_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 5672 bytes
SHA-256: a2cb17e398475d212c0e12f8b7584d87d7deec6ed3720cc711df7486bdff9a80
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 12828 bytes
SHA-256: a8a67ca8bf350cf82265c77500297043941db9119f5c3590b8e1370771f93f79

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