Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a40c9718434914…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 23:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e220d2120a3e491c2d9faf886cde7b8 SHA-1: 5e56b238e3d8341185e23a2807c817672609173f SHA-256: 50a40c97184349141b9f195ebd1a6fc82f3610d8518ba7fa4dec434a9368a8ed
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://jumiwimov.ru/strik?utm_term=que+pasa+cuando+un+carro+no+arranca PDF link annotation
    • https://cdn.sqhk.co/bupewazadufa/81nLhjb/blackpink_songs_2020_the_album.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/jepukidafube.pdfIn PDF document text
    • https://konomotawet.weebly.com/uploads/1/3/1/3/131379362/a38b75a6f46266c.pdfIn PDF document text
    • https://pupagabizazupi.weebly.com/uploads/1/3/5/3/135314982/b33250e2a9.pdfIn PDF document text
    • https://motonikepo.weebly.com/uploads/1/3/0/7/130739202/nujona.pdfIn PDF document text
    • https://rifusefabizavi.weebly.com/uploads/1/3/2/3/132303317/gewizatejuzo.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/eaf7c46ce3.pdfIn PDF document text
    • https://damajarulapo.weebly.com/uploads/1/3/0/7/130738748/2759563.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/ramutolivuveva_jukaranar.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/duzewepu.pdfIn PDF document text
    • http://moneyindia.site/tea_guide_poster5nm6v.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/cjenjJh/wallpaper_sonic_hd_3d_model.pdfIn PDF document text
    • http://tryplafond.xyz/canon_eos_utility_windows_10ursni.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/pukemifozozawoz_nizonowemigofu_terebisuj.pdfIn PDF document text
    • http://urolog.xyz/89956455310bt9z9.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/987b6b4a-29f2-4190-b56a-ec8685018b28/the_republic_of_tea_double_green_matcha_tea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ab3838-d169-4e38-a6eb-73d98e038fb1/jajuvaxubufokajobolaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfae53a8-85cb-4bf2-9a8b-303551aac34a/vewamewujibudidalupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ae1e2b-9535-4b36-af6a-0c75be5732e6/sennheiser_ew100_g2_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2683a0a9-5dd9-4c1a-872a-bb31d65dc56a/cost_to_rebuild_4r100_transmission.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_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 5096 bytes
SHA-256: 0f86eefb6f3f902f19f298ad92e7477b89848cfde8e337405263b2da5793109d
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 11292 bytes
SHA-256: 4b376dbbb002181fd604de2c27835c02bb7a32ac5dc0bd2bffaac48a5c8e1eb4