Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7d781b4b044ad8…

MALICIOUS

PDF

74.3 KB Created: 2020-12-21 23:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 41cfde9b973db878a86855a097a342d1 SHA-1: 16a9535f5ac2a9756e90a987791630846d4ef71a SHA-256: 3e7d781b4b044ad8fc328efeb77fa547911b5a916e4c14c9b9f109b4a0b0e340
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. One of the primary URLs, 'https://traffset.ru/strik?utm_term=big+button+phones+for+senior+citizens', appears to be a lure to a potentially malicious site.

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://traffset.ru/strik?utm_term=big+button+phones+for+senior+citizens PDF link annotation
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/taxokotoka.pdfIn PDF document text
    • https://latudawa.weebly.com/uploads/1/3/4/3/134308630/riroware_mibewe_boduzaxofamuba_xurufumevutore.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/tunadipamebalob_todeb_pawopewebiwab_kebolaxunepakul.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/rimejiguvif/ecfax_fund_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b310b2b4-e074-4636-aef8-52d4d0ecac5a/dokulon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b042b8467722f1fc230f/t/5fce95b008a3ca44d3b199f1/1607374256736/joplin_mo_black_population.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fded23088390d34f38c43e6/t/5fdf2b4f1c66f52f5f98977c/1608461135657/79352244408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a75890-37f5-497a-9ea9-9c8407b79a82/19388467330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6af7dfc-9c9c-4f3e-82e3-54ebb46168c0/vewapulasepepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407139f3-d70d-4207-922c-5effb06322dc/europa_baby_palisades_lifetime_crib_rustic_cherry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98c07d5-e933-40e5-b96e-00c7e6ad0357/renefena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8ab3d2-1799-4ed0-b8a5-3186db8b7e60/missouri_boating_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b650ff5-2328-4533-821e-4651d8203e7d/golaforexomusoxipagemuji.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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 5272 bytes
SHA-256: 2bd73ca23748825b49bc28b62017bc0c41c5ffb921d03fe090997dc299afe9eb
font_01_sfnt_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 10440 bytes
SHA-256: 3dc979e0279b9f621f7b25bca358f6da574b712ccfda9f446c79aed3b84055c6

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