Malicious PDF — malware analysis report

Static analysis result for SHA-256 847c396af3df9a5b…

MALICIOUS

PDF

73.6 KB Created: 2021-03-29 11:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5e5b61f133ff21e9973a8ef61ed07d61 SHA-1: a85d4d6aacf307b4d06731e9f098ff41d146ccb3 SHA-256: 847c396af3df9a5ba7cc539ea810aaf3275ebf7a3f8b3cae84cb577dccbebd67
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high volume of links on potentially untrusted hosting. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=guiame+espiritu+santo+stormie+omartian+pdf PDF link annotation
    • http://golixudib.mypressonline.com/miligudojivapozodiser.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/dozod_bifamosun_dededixulaf_vikevape.pdfIn PDF document text
    • http://netewe9.xyz/lagomufowibuvulesyntop.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/wugejumoronukoreve.pdfIn PDF document text
    • https://cdn.sqhk.co/dopenemef/eKjdjgG/adobe_reader_11_free_softonic.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/3181539.pdfIn PDF document text
    • http://net-klientov.ru/52686983757gcxhk.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/5_day_bodybuilding_workout_schedule.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/60687284469.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/plant_pathology_mcq_with_answers.pdfIn PDF document text
    • http://soldonlakewood.com/appositive_examplesi3k35.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/joraibI/takipipimexezuxavo.pdfIn PDF document text
    • http://teasmall.space/jutazafugenodufu6mvwp.pdfIn PDF document text
    • http://itayoga.space/skyrim_creation_kit_scripts4f036.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/Mgh9Gmy/league_of_legends_wild_rift_gameplay.pdfIn PDF document text
    • https://rofekituluz.weebly.com/uploads/1/3/2/3/132303072/78504b8fade0773.pdfIn PDF document text
    • http://hookup756.fun/33774812411inusf.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/tv_guide_today_uk_freeview_tonight.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/christopher_paolini_eragon_books_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/vision_ias_answer_key_upsc_prelims_2019.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_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 5068 bytes
SHA-256: e9a0a429d46791d0983fb14774f7ac279260097fdad13090967a5a1eeeef48b5
font_01_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 11844 bytes
SHA-256: 674781b0564e39b4d2671f45fce0e83d96d9265be236b7280d0afca966218cc1
font_02_sfnt_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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