Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa52ce96db5247b…

MALICIOUS

PDF

82.2 KB Created: 2021-02-27 17:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a60e0b487095d580b43ab507acff5a68 SHA-1: f7c4d530044d5f330f98d742d04910d10bbfc952 SHA-256: 0fa52ce96db5247badf547bedca66793a5409263210b3a4e675447318b77bcdb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://nipisod.ru/123?utm_term=verbal+reasoning+test+with+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fddb37b500dc.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/71607666405.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/xesatafivuwigixotisoz.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/zuzawadupumikojaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/XTewhgt/76214774327.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/how_to_play_spades_plus_online.pdfIn PDF document text
    • http://uchebnoe.website/cost_of_rosetta_stone_englishhqmmz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_6027bd8347578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_60001f60ce4f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/n8SNhbf/ball_drop_nyc_2020_channel.pdfIn PDF document text
    • http://putinoid.ru/joker_ringtone_free_download_lai_lai3i22j.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/x5ChbEL/formula_1_2020_constructors_standings.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/ahaWYhg/bluestone_lane_dc_menu_prices.pdfIn PDF document text
    • http://devlp.club/how_to_turn_off_maint_reqd_light_toyota_camry_2012zt7as.pdfIn PDF document text
    • http://lozhobelir.space/maxomupefebuwukoximotegiuhf.pdfIn PDF document text
    • http://sandiego-podcasts.com/wovivedeluguzujowaji8yo1d.pdfIn PDF document text
    • http://ecoservice-vlad.ru/31442138111typf5.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://faleferesevo.onlinewebshop.net/basic_english_grammar_online_course.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/zuwivuwo.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_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 5288 bytes
SHA-256: 0e883ca36631a0ea59acd15ac4242a2b4ef6f894f0094e50d84fe485c1393b4a
font_01_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 10744 bytes
SHA-256: c6061632bf5599ca91329ce51c6645d63b7fddda81ed09b9501bc3df21b8d1dd
font_02_sfnt_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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