Malicious PDF — malware analysis report

Static analysis result for SHA-256 69da0c7996e8abcf…

MALICIOUS

PDF

76.2 KB Created: 2021-05-05 15:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d01a039a399dc4490d4080f4b8bfa359 SHA-1: a3cc21ca3c73e3e68e8faeca7f38953d3034a925 SHA-256: 69da0c7996e8abcf2195e52d6f29a3a0681ad131d83848e8bc38c66a4e7fd91d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers as malicious. It contains an external URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The PDF also exhibits characteristics of a link farm on disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=collins+english+spanish+dictionary+free+download PDF link annotation
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/jejetas.pdfIn PDF document text
    • https://gariligiradafa.weebly.com/uploads/1/3/4/0/134041078/zamodokitaxu.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/sojosabifurogefinokovixarzchmz.pdfIn PDF document text
    • http://teagreen.space/krishnaya_vasudevaya_mantra_mp3_downloadysw6r.pdfIn PDF document text
    • http://stat-index-co.com/55225563437upsdj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_e32684fa7e8b4d12a5d44df04e5835dd.pdf?index=trueIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_6145aa197e7142f081046a62e03c161b.pdf?index=trueIn PDF document text
    • http://zogirifo.epizy.com/nfl_score_predictions_bleacher_report.pdfIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_5e22b69dab734e019476bf9be9635c06.pdf?index=trueIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_b6990ee73fb34cfdb23a9e32e7b6c22b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c4b66d-ae59-455a-b5ae-b1ef85c2b52d/daretez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5364c0-a46d-4e48-89b2-7e905e735d5f/lovogub.pdfIn PDF document text
    • http://potopaf.epizy.com/advantages_of_starting_your_own_business.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_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 5516 bytes
SHA-256: 54185eeebb83a85b0ab23df4cf1c61f5201dbfe4f5c09558c27e10164c2683d8
font_01_sfnt_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 10512 bytes
SHA-256: 30f10af88b3e76a33e1a04ce52b73796d1cc94cee38126edc9d9da2f71c82ad6

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