Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc8deb2514675f6…

MALICIOUS

PDF

68.2 KB Created: 2021-04-19 18:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3d2037e8530326cec47857b41ef6e23c SHA-1: 3c4dd6e6f026f863a0c1b373a875b1f878b339e2 SHA-256: 9bc8deb2514675f6e97829357c7b8ee209bed0b1f2e7f47d6f94ed907407c497
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, appears to reference a product review, likely a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=philips+multigroom+5000+review PDF link annotation
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/tefatof-pumupimitito.pdfIn PDF document text
    • https://xikumafugab.weebly.com/uploads/1/3/4/8/134878264/sidep-nuzupe-zuwane.pdfIn PDF document text
    • https://cdn.sqhk.co/mumoragato/SEhhXu1/fall_starbucks_drinks_without_coffee.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/fukukuw.pdfIn PDF document text
    • https://pimobepasad.weebly.com/uploads/1/3/5/3/135347335/6153322.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/gjdPhje/77353442467.pdfIn PDF document text
    • https://mixizuvas.weebly.com/uploads/1/3/5/3/135383824/fatepomosafulakin.pdfIn PDF document text
    • https://zubefexer.weebly.com/uploads/1/3/1/6/131606337/xepulo.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/dhdpii8/86194640533.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/teruravusabe-zopitixo-modito.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/jgbic2I/13018437117.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/rihhafj/battle_ops_mod_apk_unlimited_money.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/089e8a6e6.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/lavufitosu.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/1915367.pdfIn PDF document text
    • https://cdn.sqhk.co/buzodafevuj/7oidQhh/fly_racing_tour_roller_gear_bag.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/lidijg5/ruzebe.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/sjhgchd/wosojigabewebi.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/d477765b-813c-412a-8304-0b024e37b6ba/raxolaxidopanizefopakaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b024807f-1a75-4011-a011-eb1d63f522e8/apollo_twin_usb_cable.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/minn_kota_riptide_terrova_80-lb._i-pilot_trolling_motor_24v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f83863c-8665-413c-9ff6-e61105224133/resumen_del_libro_alquimista_de_paulo_coelho.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/what_do_the_masks_symbolize_in_the_masque_of_the_red_death.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_off0000cc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC64 5440 bytes
SHA-256: d76c4a3a2bc7d1d6e622a1f18fa4c892a8c70b1f2eb033949ddb348857d26868
font_01_sfnt_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 10104 bytes
SHA-256: 24b81a7c75523ef714c750b34b01970dde94073fb6e22c42869af27d45042eaf