Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecf9345ea41e543…

MALICIOUS

PDF

63.8 KB Created: 2020-12-07 15:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5a4caa7c2de27cea5de950e6faa813dd SHA-1: 790e816e251a059c61b5f8d875878ae8f84a5eb9 SHA-256: aecf9345ea41e543ace5c0c6afdedd9542331086338d7d5ef9356c77cb289ba4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafftec.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=dictionary+for+java+240x320 PDF link annotation
    • https://gikowotezura.weebly.com/uploads/1/3/4/4/134493608/robevebiv.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://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc21502fa04221c7167221f/1606554883643/xedixu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/michelin_easy_grip_evo_13.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/book_dust_cover_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ebffabffab30daa8de6c/t/5fcb590d85bc3a28a60917ca/1607162126256/47890396621.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03fa64be903ae6415a66/1606222843067/samsung_model_rf31fmesbsr_aa_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/36_inch_wide_over_the_range_microwave_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9225df31-0130-4b3f-be87-628f05bf6c16/college_application_deadlines_2016-2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c8f51452f90b7fe4c8fc/t/5fc0e46c145a8629dcd1ce17/1606476909494/exide_xmc-31_megacycle_agm-200_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55cc72e34347c7062119a/t/5fcdf935d235d37878ea3322/1607334203849/beat_hazard_ultra_apk_1._20.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/55087687793.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53b4dd49dd1244750b521/t/5fc71beeb2fa4660c8ccdd92/1606884336140/black_friday_sales_2020_walmart_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafacf0e-2b32-4521-9590-10238ebd35f3/62660012372.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_off0000afad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAD 5164 bytes
SHA-256: 56f5655d141864fa520e84c55c1b1d21ef98d202b99089957c3245c456f59068
font_01_sfnt_off0000c15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15F 10112 bytes
SHA-256: c06da5f5a4397b3b12103a102b90ceba0e5b4b22dab09fd0a7b9101145955cea
font_02_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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