Malicious PDF — malware analysis report

Static analysis result for SHA-256 718d00f2eb2885f5…

MALICIOUS

PDF

90.4 KB Created: 2021-03-18 08:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f25840fafc13a54165f96a0ce4eab394 SHA-1: 55ed230ff7b0959f4268ee6b0a4c2666b4432771 SHA-256: 718d00f2eb2885f52c6f332e453438665d85f4a231f1f1ec81a887a20035c3b4
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 0.9997

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://midufefew.ru/strik?utm_term=mini+hundreds+chart+to+120 PDF link annotation
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/jutetej.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/piwosedi.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/mazagijow_ramememufebetog_sarimoponuf.pdfIn PDF document text
    • https://rezemofojo.weebly.com/uploads/1/3/5/3/135321986/2022211.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/lageloginivoxe.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/53300413174.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/2963337215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_603efdf61dca8.pdfIn PDF document text
    • https://boxenujanazikof.weebly.com/uploads/1/3/5/3/135302290/fizapigeliruzovad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_6017ccb812993.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/vaxakikigakofojim.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/nudisol.pdfIn PDF document text
    • https://zoxukumej.weebly.com/uploads/1/3/4/3/134327216/xelejop.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/4745936.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/ditojesabavaj.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/muboxebixelu.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/venenexig.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
    • https://uploads.strikinglycdn.com/files/acb252f7-fda7-43e4-8a51-027f45f13c4e/medical_surgical_nursing_book_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e64afa-88bd-4639-9475-e870e5251157/gidisavixexefido.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001148e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 5208 bytes
SHA-256: c00232eb2a617d950eb1a88d29b1d7b0efe624ffee754dfc566fa2da4f2c9d6f
font_01_sfnt_off0001262b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 11720 bytes
SHA-256: 87091ca2829523b9b9b7192f85ade72587dc09ed196fb7d644b425de70406d24
font_02_sfnt_off00014e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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