Malicious PDF — malware analysis report

Static analysis result for SHA-256 787edc2ddadede6b…

MALICIOUS

PDF

140.6 KB Created: 2020-11-29 20:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7233b864a819e12df4e1419321642e1e SHA-1: 5fe1ad57428e969f4ecb6d445c23627f9e9997bf SHA-256: 787edc2ddadede6b51ce967995ea1dd48893fd8302d4a9ef446be8a8a8d274eb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on cloud storage services, suggesting a link farm or SEO poisoning tactic. One of the external URIs, 'https://trafftec.ru/strik?utm_term=front+thong+swimsuit+backlash', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=front+thong+swimsuit+backlash PDF link annotation
    • https://bitokulizawefe.weebly.com/uploads/1/3/4/6/134684274/xazese-zidapujereba.pdfIn PDF document text
    • https://nonudefetug.weebly.com/uploads/1/3/4/3/134314303/koxewa_xajeju.pdfIn PDF document text
    • https://jesokawafaz.weebly.com/uploads/1/3/4/6/134626724/791602.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://s3.amazonaws.com/felasorarabipis/john_deere_lawn_sprinklers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f906e01-0a55-44d5-86b0-52265c9ce013/mefumofofibanogelezud.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/jadekuzezanuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/fahrenheit_to_celsius_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/xavafuduxoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a8361c-ad7c-4ab1-be1a-60df2048e0eb/91274811640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21de4b3c-6dc0-4ba8-acf9-ab39a5d8a21c/81133942995.pdfIn PDF document text
    • https://s3.amazonaws.com/jolufozo/50015725225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fda4f83-06bc-4baf-b1f0-84c24cbdee69/on_fire_letters_fortnite.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_off0001e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E089 5228 bytes
SHA-256: b6868873f453cd378ef2e560717697a4f44aebef06686a188335c818595d0f8a
font_01_sfnt_off0001f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F237 10784 bytes
SHA-256: 31ab3858795cb05c049c11b93c16b36cc4562a151fe26797694406021b601879
font_02_sfnt_off00021715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21715 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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