Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c6067579b980f5…

MALICIOUS

PDF

80.6 KB Created: 2021-03-05 10:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 91808851ac555acb0b68a7590f0b4e21 SHA-1: d319785fd580d24106ce88dd8b3092b7534f3a33 SHA-256: 90c6067579b980f593f4bd7e1c69401b11c953a31e3523b4c4ded113ac85e596
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 0.9954

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=how+long+does+it+take+to+fry+a+turkey+in+a+butterball+fryer PDF link annotation
    • http://card2card-perevod24.site/download_real_flight_simulator_rortos_mod_apk74u9v.pdfIn PDF document text
    • http://reduslim-italy.site/how_to_reset_epson_xp_600_ink_pad_counterj5tun.pdfIn PDF document text
    • https://cdn.sqhk.co/kazakilen/at2Nk8g/our_mother_earth_nowadays.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/23067268690.pdfIn PDF document text
    • http://spoonnumberone.xyz/gta_5_steal_a_jetyvi5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_6030ce7267a05.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/brWzZgd/56129130215.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/what_is_the_price_of_ps_vita_in_india.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_601920f95261d.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/uj8hhjd/xilitifomirif.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/69110875815.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/2381599083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5ff6280771a49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5fc75eed87b4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fffa4a82f56f.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/hAZcgdu/19808164683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_602fdd8f349b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_601ceebb5ad2c.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/eghvkii/us_civil_war_map_with_border_states.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/ajb5UvO/ac_odyssey_atlantis_dlc_gameplay.pdfIn PDF document text
    • http://trixy-matrix.space/is_gdp_a_good_measure_of_economyi4ht0.pdfIn PDF document text
    • http://mx50off.info/dikajivtzjj5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_600656dc77b53.pdfIn PDF document text
    • https://cdn.sqhk.co/fofanibiv/jhigkhf/39479752158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492240/normal_602d480a575f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://redifigikutusoj.myartsonline.com/tofonokaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 5316 bytes
SHA-256: 495d868504b8bdcc196dda111220128638911feea1cc87dda6cdd36cbcb2bd27
font_01_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 10640 bytes
SHA-256: 2ecd73f6754e4a1aa913b57abcbc17507c6b79188b6decf0fac9455dd40b666c
font_02_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3