Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa2df7d0df7aad2…

MALICIOUS

PDF

76.7 KB Created: 2021-04-10 20:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a736a0fc8da2485565f0d9176bd85f46 SHA-1: cb2c8676959051402697e7b5a6f9ad97c5c19469 SHA-256: 4fa2df7d0df7aad222772f3d39d90534c3f00b6e96507773fa1d17b7102a0e71
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a URL with 'utm_term=google+search+dark+mode+desktop' suggests a lure to trick users into visiting a 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 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://soxebez.ru/strik?utm_term=google+search+dark+mode+desktop PDF link annotation
    • http://dronextactical.xyz/banupesonajosinatuvasa58vqc.pdfIn PDF document text
    • http://zotaravaka.22web.org/77652755232.pdfIn PDF document text
    • http://elinekici.online/899483723594fxns.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/hiTyljb/41344096230.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/Vt3irGF/tanisobejatopizisemuj.pdfIn PDF document text
    • http://ogranifruit.space/sarkar_movie_tamil_isaiminid61f9.pdfIn PDF document text
    • http://ruvetimoroneb.iblogger.org/85906772085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b6f94b-cefc-43f1-9941-ff85ead8eb2e/what_is_spanish_for_purgatory.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_a64443be750a4ff7a73f55f809bc0463.pdf?index=trueIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_25f61b8499664b748df7eb540f279340.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_23b8e40f17cd40f1bca15e3cbce717df.pdf?index=trueIn PDF document text
    • http://tezidenu.epizy.com/bam_aerobic_plate_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2243191f-e2c7-4dc1-9ad4-cd183db34872/tasezuk.pdfIn PDF document text
    • http://fomonew.rf.gd/basic_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66725408-390a-40f5-99fa-52db5c0f185d/46411344215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac029faf-d721-4dda-a565-2b74d63eddf5/5471377707.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_2319a9ee0a7f4081b8f483029ee8ea0f.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_6a2584bb5a6e4d68afad58526886aa4c.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_16d94fca68044499b74b0bee1666dfc2.pdf?index=trueIn 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_off0000ec32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 5580 bytes
SHA-256: 864544d41cb1ed3a4f4c07ad18d3795e6daf2dd2fed57e67a8264e7a0547f2ea
font_01_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 11444 bytes
SHA-256: 3b4053f6d20fe1ccc09860f4a5d30c35b58b1e21bfe22fc2a2390d4ec8c191cb

Open this report in the interactive analyzer, or submit your own file for analysis.