Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce4bd0fe5906100…

MALICIOUS

PDF

66.7 KB Created: 2020-11-14 11:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 345c85c728f8f122e4d2a57e99be0acb SHA-1: 906a3d63d174476c74e1ea75ac300bbebc37ecf4 SHA-256: dce4bd0fe59061008580e4f2a7f8c350ce9979e7172d9eb501a1b7775e91a870
156 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 0.9998

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 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.
  • 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://traffset.ru/123?utm_term=electrical+distribution+system+analysis+pdf PDF link annotation
    • https://lexebemo.weebly.com/uploads/1/3/4/3/134315688/vuxoreruva-sufesapopuxejaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f8ff1943f901.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/ffdcf71395daab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485821/normal_5fadc6eccac75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ed347f-0a02-4df2-a176-666ed2992c56/fnh_slp_mk1_tactical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a63c1a1-40a8-4598-93a4-e1e8cfb3993d/the_real_mccoys_tv_show_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/como_funciona_un_aerogenerador_eolico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c96d8a-2952-458a-a7ef-9391512d6965/84358871746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d00b67-a9ad-4b39-924e-c27d65447d67/bukimomeziwiromutozesetid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde4b605-2913-486c-8dd0-beeb6c15b2d5/oshkosh_west_football_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac03e16-dfe4-4780-a8d8-7f2885ac4bfd/zegugurojexofevomewigudas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa997dc-5475-4983-aac7-3b897ccbe1b9/pumekigudubobusebogofolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52873bf-9a20-4451-9326-e3a9b87c1224/89525421595.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/solidworks_render_image.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_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 5500 bytes
SHA-256: b0ec3f808181c6c1b8d24f5f90cdf68bb4330b6bd9e8650a795e2ceda9d54c66
font_01_sfnt_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 10556 bytes
SHA-256: 34401ff509000b5d4d42b381d8fd5df76261cb3bf7630856e9d4a400ede14475

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