Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baed5fe334ee57e…

MALICIOUS

PDF

76.2 KB Created: 2021-04-07 15:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bd81e77ff52bc2b4eb6817cf6551ca8d SHA-1: ec5300b6fb706fe34a2eae8836ff39a1338b2cbd SHA-256: 1baed5fe334ee57ec6f997cc526a38aa6cd355fb2b9d958965b4c623781956d2
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 0.9991

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://botokaw.ru/wix?keyword=brocade+network+advisor+san+installation+and+migration+guide PDF link annotation
    • https://cdn.sqhk.co/mesojofu/Lihhjfu/wiczenia_gramatyczne_angielski_klasa_5.pdfIn PDF document text
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/tokoz_fibagidal_dowitefimukowu_dodufixaposa.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/iw7xgiO/ice_cream_cone_clip_art.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/topuraviwu.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/esihxHk/zamopedamulapevopuxabumer.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/nghfwep/cartoon_video_status_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_60280ec986232.pdfIn PDF document text
    • https://cdn.sqhk.co/tanemurad/hhgIjbq/tawupewakukodexevovaxumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5fdd78d4373e1.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/xniglsZ/wutuginokogudiwiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6062c43abfa82.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/7DghAhj/23792798986.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/fRggtln/pixel_car_racer_porsche_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/jdNxheI/block_puzzle_classic_1000_plus.pdfIn PDF document text
    • https://xalovediluf.weebly.com/uploads/1/3/1/3/131380345/1552143.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/463c8bb24d10f1.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/godazeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fd61ac707aa9.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/likerajatob/35520604982.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/boundaries_henry_cloud_summary.pdfIn PDF document text
    • http://wakojemoxu.rf.gd/xfinity_xr2_remote_power_button_not_working.pdfIn PDF document text
    • http://judejelalub.rf.gd/29517971926.pdfIn PDF document text
    • http://laxizibobi.rf.gd/circle_of_fifths_print.pdfIn PDF document text
    • http://varewokumozikon.rf.gd/adobe_systems_incorporated_free.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_off0000ead9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 5524 bytes
SHA-256: c8e7e8fbfb472b484d05d3f676887c724a4a4dee4bc58dc122add4569b2803f1
font_01_sfnt_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 10852 bytes
SHA-256: 7018a4a41de1eaeed02a0060cd1e97fdf575d51a30678b413c0b9a62bf43b8f1