Malicious PDF — malware analysis report

Static analysis result for SHA-256 7add9140e5c8a027…

MALICIOUS

PDF

72.3 KB Created: 2021-03-02 14:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1ceb1a9026da1a85dc48b6af24d1a1c1 SHA-1: 294032763131ce11d82b05b280e5db9037aaa319 SHA-256: 7add9140e5c8a02766efe82d1c697010c458889f020ac609eb026006c6da0710
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

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://xajibur.ru/strik?utm_term=can+a+poisonous+snake+kill+an+elephant PDF link annotation
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/bd257c6c672.pdfIn PDF document text
    • https://fenolipemul.weebly.com/uploads/1/3/4/3/134341818/e3a2b84.pdfIn PDF document text
    • https://gesuveta.weebly.com/uploads/1/3/2/6/132680901/birejuzamoranug.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/jWihoFG/81959674855.pdfIn PDF document text
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/nepixorobolidivegoz.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/ihjKhc1/natural_face_mask_for_oily_skin_and_blackheads.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/remuwolozero.pdfIn PDF document text
    • http://romikemixukoj.iblogger.org/splatoon_inkling_language.pdfIn PDF document text
    • http://mivibowefumar.iblogger.org/moneranoribavekaden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijikabetabup.rf.gd/bacteria_transformation_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/87027592611.pdfIn PDF document text
    • http://pexarazeju.rf.gd/gefolegesogijubipe.pdfIn PDF document text
    • http://vepesupilet.epizy.com/wafamiwemiraza.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/format_string_to_2_decimal_places_c.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/marine_accident_investigation_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/construction_company_organization_chart_template.pdfIn PDF document text
    • http://zepibugab.rf.gd/buffalo_lake_wisconsin_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/birthday_wishes_for_sister_images.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/90320910011.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_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 4780 bytes
SHA-256: dc9b6eefe3d8e2e685a1e88d30bf5a61f1d5456d3d70cabdfbe967d8de1ae801
font_01_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 10376 bytes
SHA-256: 5f9568e604f4c69651eabff0c725e289010eb7c0e2430156a209814c4163a1a4

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