Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6301b4553859a75…

MALICIOUS

PDF

64.0 KB Created: 2021-03-03 03:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 90de22b208709ba4f3e8a23671df68b9 SHA-1: 73df7e1a687b99fb28e72ccab13275062a4fa14e SHA-256: a6301b4553859a7578cb32caff2be8c70ce14bb406189a3b535d1e941e219049
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8630

Heuristics 4

  • 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
  • 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://baarspo.ru/award?keyword=skyrim+vortex+load+before+or+after PDF link annotation
    • https://cdn.sqhk.co/noruwotil/gidjcJU/photo_collage_template_photoshop_psd.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/ejeo1zr/52156019845.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jg2gfif/mountain_bike_clipless_pedals_and_shoes.pdfIn PDF document text
    • http://paypallsecurity.com/how_to_run_diagnostic_test_on_kenmore_he3t_washerbvgk1.pdfIn PDF document text
    • http://stalekost.site/how_to_scan_from_epson_printer_to_computer_wirelesslyupt8q.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/jfggW1t/history_of_christmas_carols_and_hymns.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/egerjgv/wuwemiwilewe.pdfIn PDF document text
    • http://grizhoff.ru/troy_bilt_4_stroke_weed_eater_attachments3jmgm.pdfIn PDF document text
    • http://yandex-dostav.ru/87698107189hnzns.pdfIn PDF document text
    • http://aydym.club/mukelugibafonaaor14.pdfIn PDF document text
    • http://spainsale.pro/abhimanyudu_songs_vishal3i6ty.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/7hcIjf5/pba_bowling_playoffs_round_of_24.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hDkUjaR/56189760410.pdfIn PDF document text
    • http://otomail.business/dimanogunommqpah.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/Fughj0F/58200143113.pdfIn PDF document text
    • http://springtea.space/jijevolalujezodt2ra.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/nokiva/bollywood_songs_mkv_videos_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 5412 bytes
SHA-256: 66d3ca1eb209020cc57d1794a635ae371096f5c8253cff0d9f13e0be07a91d62