Malicious PDF — malware analysis report

Static analysis result for SHA-256 59807e33f9cf2960…

MALICIOUS

PDF

69.1 KB Created: 2021-03-14 03:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 646570f22cd33c06ac30ed4d845e3da8 SHA-1: 66a15a10f28708b80862505dbb3cd2bf1009d860 SHA-256: 59807e33f9cf296016042fd1399f2cabba973116029a9435de1f3700afdd364b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://jacksth.ru/strik?utm_term=iceberg+slim+pimp+book+free PDF link annotation
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/6696448.pdfIn PDF document text
    • http://verenica.net/puvuwou7uxe.pdfIn PDF document text
    • http://ueuniti.xyz/15572765943u4864.pdfIn PDF document text
    • https://dirarogevuku.weebly.com/uploads/1/3/5/3/135351224/rudiwe.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/schwinn_spin_bike_for_sale_melbourne.pdfIn PDF document text
    • http://s7hmus.org/bogesivamakolatahi0vg.pdfIn PDF document text
    • http://cleaner360.shop/93575116788utjnu.pdfIn PDF document text
    • http://bella24.xyz/18016796652pq6ft.pdfIn PDF document text
    • http://presentinsta.site/halloween_fake_nails_amazon2mstv.pdfIn PDF document text
    • http://phillipen.online/hp_deskjet_3050_j610_series_software_download_freeduv6r.pdfIn PDF document text
    • http://bluebadge-support.com/1852749008xctd0.pdfIn PDF document text
    • http://tibetterrier.ru/ibanez_gsr200_control_knobsg3llp.pdfIn PDF document text
    • http://swiss-family.space/bucket_truck_trainingj6scz.pdfIn PDF document text
    • http://stassikorskyi.com/zutupelabawfohb.pdfIn PDF document text
    • http://skidki-day.shop/ruxiji5wwyh.pdfIn PDF document text
    • http://korsabarca.com/biochar_production_technologyhgqhh.pdfIn PDF document text
    • http://secret-empire.ru/walegufivinevegegavi3cily.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/juwofuxufijup/20494121818.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/sweatshirt_template_front_and_back.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/zavedenuviloluwewe.pdfIn PDF document text
    • http://maxuluxusit.atwebpages.com/pafemirokunupokojezaw.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/abba-_mamma_mia_song_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_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 5268 bytes
SHA-256: ddcacf65f306a2b1f240e4a7af4fdbea7665afa9c953871f6dfa12f3db4955df
font_01_sfnt_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 10764 bytes
SHA-256: 011e80cedf7a39fe7542b36e40592e5596d714efca99160306243451732e5379