Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c86fbb1860a79c1…

MALICIOUS

PDF

91.1 KB Created: 2021-03-07 06:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b7f6d5a2bbc0f092f603ad499f444c71 SHA-1: b913b4170eeb824476c5331e0889baf02aab7fd3 SHA-256: 8c86fbb1860a79c16d798ed8fe57cd18d309b9ffb2505a442a0cc71241061dd2
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, hinting at its generation method and potential use in automated phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=the+red+fox+clan+pdf+free+download PDF link annotation
    • http://rodsfish.club/little_house_on_the_prairie_season_10_episode_1_dailymotion1tnxx.pdfIn PDF document text
    • http://roskycnmx.com/4373385847133hb2.pdfIn PDF document text
    • http://anarchymedya.com/link_belt_cranestbp11.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/33095289875.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/jjaQZjf/classical_piano_music_sheet.pdfIn PDF document text
    • http://lexusesadedebaz.22web.org/53196350843.pdfIn PDF document text
    • http://funuretebinuzos.iblogger.org/chikati_gadilo_chithakotudu_full_movie_movierulz.pdfIn PDF document text
    • http://baby-slings.ru/32659772803lxmj3.pdfIn PDF document text
    • http://arfesopt.com/suredujevigafulusudojp7qg7.pdfIn PDF document text
    • http://okrasote.info/golden_vantage_range_hood22omw.pdfIn PDF document text
    • http://pihodze.com/can_you_do_dbt_onlinen2j7y.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/69205639938.pdfIn PDF document text
    • http://datab.vip/vatoretofopazugudebu8ynxb.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/what_kind_of_government_did_the_soviet_union_have_during_ww2.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/g6L8jai/98707977001.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/gc7JQig/90_s_hip_hop_music_hits.pdfIn PDF document text
    • http://babysampler.com/tomtom_start_60_max_sd_cardwxwc2.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/fUghUia/80027003169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/best_slide_in_electric_range_with_warming_drawer.pdfIn PDF document text
    • http://moxuzaridob.onlinewebshop.net/10498041668.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/1_000_places_to_see_before_you_die_us_and_canada_list.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/westinghouse_remote_codes_for_directv.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/kegoburexexutuxabexepar.pdfIn PDF document text
    • http://sebipukavore.epizy.com/google_drive_blank_calendar_template.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/42897205077.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_off000128b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B4 5176 bytes
SHA-256: 4126d947fbec4389f693b3936549eba55627a78c2cbbf45e9976ad32384b1cb4
font_01_sfnt_off00013a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5E 10648 bytes
SHA-256: 41a8a84448a0c26d75d0f4126b81fe4136b5c8fcabb49871660b7e6265ff22d0

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