Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eab52b4d06c481…

MALICIOUS

PDF

80.7 KB Created: 2021-04-07 03:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0f1bfce91aba7615eeee0f19923e39a6 SHA-1: 78038d9d94039f226590bd11f7755696cf416ed9 SHA-256: 64eab52b4d06c48189c76e2769dcf3e54f0c4b8deb051713a430e33ccccd72ef
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'free translation pdf file' and 'wkhtmltopdf', indicating a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://botokaw.ru/award?keyword=free+translation+pdf+file PDF link annotation
    • https://cdn.sqhk.co/gotakavapu/hjjaVUP/28072584876.pdfIn PDF document text
    • http://kepidurenomabo.22web.org/17442361001.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/74629128767.pdfIn PDF document text
    • http://vesitifev.22web.org/pitozadikorugulewa.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/55650190799.pdfIn PDF document text
    • http://mivifukatovaga.getenjoyment.net/90491379635.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/funopegubo.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/bissell_proheat_2x_manual.pdfIn PDF document text
    • http://xozukasel.iblogger.org/affinity_photo_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sobilowibid/djb5Agd/38587741888.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/21891416998.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/QgdBric/xomaki.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/90906284704.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/Cifjcjg/xutowugukoxa.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/zatozixutujusupanapogo.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/Zjbjghg/bodybuilding_exercises_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutagefev.epizy.com/functions_of_nouns_worksheet.pdfIn PDF document text
    • http://natukifuza.atwebpages.com/ccna_100_105_study_guide.pdfIn PDF document text
    • http://giraxajo.epizy.com/t_shirt_designer_app_free.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/59987073181.pdfIn PDF document text
    • http://pevoxetawalob.rf.gd/rpg_maker_xp_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/what_does_rule_101_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/13797906075.pdfIn PDF document text
    • http://gupemag.epizy.com/sixexepofarupajis.pdfIn PDF document text
    • http://nagivozuzosawax.rf.gd/yasin_sharif_download.pdfIn PDF document text
    • http://kepipejesa.epizy.com/windows_api_reference.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/nisezanu.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/mukulidedubozitesop.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_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 4988 bytes
SHA-256: 498e4129b7a6a4f4b747f31c4715881e99f9625ea26942ad97e2156b44960c81
font_01_sfnt_off0001118b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118B 10420 bytes
SHA-256: 563f2730905005386e6c6302690b68130a51117ffbbfd90cf16653bf571e9486

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