Malicious PDF — malware analysis report

Static analysis result for SHA-256 de19b6f67d2504f5…

MALICIOUS

PDF

73.4 KB Created: 2021-02-21 13:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40127126dcf9e0aad5744fa04feacbe8 SHA-1: 64210c48e53adf24ba77f03dd6c34b37f2d12cb4 SHA-256: de19b6f67d2504f59e780e0166e6523652bc022b1c0fcd1a87cacce63571d38c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as 'https://maypoin.ru/strik?utm_term=tres+metros+sobre+el+cielo+pelicula+completa+3+trailer', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=tres+metros+sobre+el+cielo+pelicula+completa+3+trailer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473340/normal_5fd7a80be90c4.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/f1e2214.pdfIn PDF document text
    • http://5gusevshop.space/oru_mezhuthiriyude_mp3_song_free_downloadenuvu.pdfIn PDF document text
    • https://wiludexubusut.weebly.com/uploads/1/3/2/7/132740186/3650e0fda3eb17.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/7754345.pdfIn PDF document text
    • https://pirodiditabun.weebly.com/uploads/1/3/0/9/130969169/pevowewanofed.pdfIn PDF document text
    • https://norotenivepele.weebly.com/uploads/1/3/4/0/134042349/7897593.pdfIn PDF document text
    • http://gadolokelijibus.iblogger.org/motorola_moto_g6_xt1925-2_manual.pdfIn PDF document text
    • http://smirno.life/angular_5_form_validation_emailq0d5e.pdfIn PDF document text
    • http://bestgirl69.com/simoxomesoseruvupookfau.pdfIn PDF document text
    • http://salonapp.xyz/58555968747lhjz8.pdfIn PDF document text
    • https://lumekagaxegi.weebly.com/uploads/1/3/2/7/132712489/tebesiwejilamafujolo.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/6423895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxoxamaxanibi.epizy.com/52445660883.pdfIn PDF document text
    • http://femavumifixomud.rf.gd/24180444365.pdfIn PDF document text
    • http://zatafefot.rf.gd/blynk_app_tutorial.pdfIn PDF document text
    • http://dukazaxotak.epizy.com/37580879729.pdfIn PDF document text
    • http://ditinalozevid.epizy.com/24931845336.pdfIn PDF document text
    • http://pedefulavok.rf.gd/vibodalavad.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_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 5332 bytes
SHA-256: 57df823b316941231ea757a5a01ac68423f3a5299ae43a25efa83bfecb5df7d2
font_01_sfnt_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 11464 bytes
SHA-256: 4101efa59694e7063e836f0bfe6e3817e7c4e30948d2bb0fd6543be9b4f93556

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