Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb018914b8a6673…

MALICIOUS

PDF

76.3 KB Created: 2020-12-25 07:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8cc3879bcf100bd90bb8d77cd954d3bb SHA-1: 36e7906363e91181d4b483f8af08b37b892d59a3 SHA-256: 4eb018914b8a6673c143625c92845c21c5e37c0e245ccf4e5bfcb83dd2f33a01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. Several of these links point to potentially malicious domains, and ClamAV detected the file as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or SEO spam purposes.

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://trafftec.ru/strik?utm_term=okcupid+reviews+2020 PDF link annotation
    • https://tinavabubopani.weebly.com/uploads/1/3/4/3/134317914/7785d8.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/6a7a00.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/tokukodovoba.pdfIn PDF document text
    • https://demomejisalazi.weebly.com/uploads/1/3/4/8/134869482/bovurovibokinapejuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5fda2363ba705.pdfIn PDF document text
    • https://tifubevova.weebly.com/uploads/1/3/4/4/134458665/bdaffa0.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/1052771.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/wisuw/sport_heads_basketball_unblocked_championship.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/platform_bed_frame_no_slats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8910880d-5fbb-43b8-8d1d-2338f30012a6/stealth_400_turtle_beach_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/kizex.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/joindre_plusieurs_mail_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/12270602742.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/medicare_power_wheelchair_evaluation_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2db2d6-228f-4fc0-8215-52ec8bc16140/regafirepilabor.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/66274706490.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5344 bytes
SHA-256: 52ca908c715031ee435459c30464308891b3980ce4d7f604f171e486945d2ed1
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 10656 bytes
SHA-256: 0c591a82a051c83493b19d1b20a05d1348a6a26e6627d418042f6951dc489dfe

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