Malicious PDF — malware analysis report

Static analysis result for SHA-256 1411c8c6a7433634…

MALICIOUS

PDF

78.0 KB Created: 2021-02-23 19:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7334cbc143ea4bf36274ef3b9e6ca919 SHA-1: d719fe6b0fe6a26b1562b1acae49432ef2f92dbf SHA-256: 1411c8c6a74336349ee5ce7645192bf6184374b8e130fb5f787b28e6e09c88d5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body and embedded URLs indicate a link farm strategy, with numerous links pointing to potentially malicious domains. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to phishing or malware download sites.

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://jottigo.ru/strik?utm_term=how+does+phonics+support+the+teaching+of+reading PDF link annotation
    • http://originalhallyu.com/naruto_ultimate_ninja_apk0n3x8.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/jitizetijig.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/mosque_pronunciation_guideb5f1p.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/5346921.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/hhpjcgg/500px_photo_sharing_photography_community.pdfIn PDF document text
    • http://bathforlegs.xyz/virus_protection_free_for_android114nk.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/fhh7yia/sivofizifiritunoguvarafu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/hijgX5G/82728684487.pdfIn PDF document text
    • http://mishgen.com/javukofaruxtgkw.pdfIn PDF document text
    • http://jobs-ingenieur.best/best_android_chat_app_without_phone_numberi3znj.pdfIn PDF document text
    • http://digtalcaliper09.xyz/samsung_un32eh5300_manualtqefe.pdfIn PDF document text
    • http://dressnbuy.com/389998860075xkke.pdfIn PDF document text
    • http://hiziryigit.online/rumirizoxevarifewekexadims72wt.pdfIn PDF document text
    • http://bu-markett.com/diwebavar6nrsc.pdfIn PDF document text
    • http://trujillostacoshop.com/four_times_tables_sheetwz2qn.pdfIn PDF document text
    • https://cdn.sqhk.co/gawarebadal/7fqcggy/78476666992.pdfIn PDF document text
    • http://roman-holidays.shop/muzapogevojagawospyka9.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/makumapikeze/cartoon_movies_english.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_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 5440 bytes
SHA-256: 44e8f4aa576bab23f57c193135568b8ad83a56134e90ce3ccf1d4a054fb3c312
font_01_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 10544 bytes
SHA-256: 1589a9ed08e3eeaf72ed5b149ad1bc93d1aa299ff2500a325e8931eceacffe05

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