Malicious PDF — malware analysis report

Static analysis result for SHA-256 df690ac26a6181ad…

MALICIOUS

PDF

86.1 KB Created: 2021-04-12 10:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 24f4cd25b2eaa41dea9b47ab5e11d4cd SHA-1: bbe6b8fdcf81581ce643702c1244e940dd5e1396 SHA-256: df690ac26a6181aded58ccd593af7439955fd87004bd792812d1acba7f76deb5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The primary URL, 'https://resalured.ru/strik?utm_term=how+many+fablehaven+books+are+there', suggests a phishing or scam attempt by disguising malicious content as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=how+many+fablehaven+books+are+there PDF link annotation
    • https://cdn.sqhk.co/torujazelome/jicGig3/79521480818.pdfIn PDF document text
    • https://kusafowagu.weebly.com/uploads/1/3/1/8/131871480/pilope.pdfIn PDF document text
    • http://krokoboko3.xyz/altered_carbon_netflix_season_2tseog.pdfIn PDF document text
    • http://3-bureaureport.info/how_to_install_hardwired_smoke_and_carbon_monoxide_detectors5ujb9.pdfIn PDF document text
    • http://citrus-fruit.space/ap_us_history_crash_course_bookrl9pa.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/48919589bbdc622.pdfIn PDF document text
    • http://letufemew.22web.org/88608090807.pdfIn PDF document text
    • http://card2card.live/boxers_diet_plan_weight_lossxola9.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/i9jafgf/guilty_pleasure_lyrics_attila.pdfIn PDF document text
    • http://hookup754.fun/mowojafimaxotevigekasxxkvi.pdfIn PDF document text
    • http://bred-enligne.com/vunirulekuo6rr6.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/xiliji-moxisuwunegib-taturitokumuja.pdfIn PDF document text
    • http://lozhobelir.space/kirolafonowag8i0.pdfIn PDF document text
    • http://nout-sale.site/complete_list_of_all_irregular_verbs_in_english264lu.pdfIn PDF document text
    • http://reduslim-buy.site/37671220338sdjwv.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
    • https://s3.amazonaws.com/defujo/whats_on_awards_2020.pdfIn PDF document text
    • http://jipokogave.epizy.com/60230755053.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/3d_cartoon_maker_app_for_android.pdfIn PDF document text
    • http://wolidile.rf.gd/hp_pavilion_beats_audio_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/61921091584.pdfIn PDF document text
    • http://pevivudawof.epizy.com/analog_and_digital_signal_processing.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/anaconda_ubuntu_16.pdfIn PDF document text
    • http://kotimopinurixig.epizy.com/90710518892.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_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 5164 bytes
SHA-256: 6627cd8a506e308721c0f43702dc50557e69b4a7817d180914221e597229d135
font_01_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 11204 bytes
SHA-256: 0e6e9385c572b41e5099487067c9a0808b91762e3e813c38d4b3308a28ad6f9f
font_02_sfnt_off00013cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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