Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a47d779b9f4e61…

MALICIOUS

PDF

95.4 KB Created: 2021-04-02 12:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 90151c42596d3d0a1951ad8ea68f6d68 SHA-1: 25ea5079bebfeda3f23e11d3a1195c12627e7b5d SHA-256: 00a47d779b9f4e61cb8db3402de94b92133df585ea35665ab45a42b33166a0be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and Weebly-hosted files, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://golowaki.ru/strik?utm_term=el+principito+pelicula+1974+online+latino PDF link annotation
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/2828545.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/tukipatasarokibonuza.pdfIn PDF document text
    • https://wopatozobaw.weebly.com/uploads/1/3/2/6/132682171/fagopezal.pdfIn PDF document text
    • https://sebinegovana.weebly.com/uploads/1/3/4/0/134095930/pisupij.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/buffy_coat_preparation.pdfIn PDF document text
    • https://beweluka.weebly.com/uploads/1/3/4/6/134694692/woridewozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_602178af6426a.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/azure_certification_training.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fd93b47a61e8.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/88504.pdfIn PDF document text
    • http://didopikorubozav.iblogger.org/jiwokokubasuxaw.pdfIn PDF document text
    • http://vetovikaxu.mypressonline.com/64440429809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_604d00f8584a6.pdfIn PDF document text
    • http://viwoxavufonodu.22web.org/eagle_signal_timers_catalog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vemesedesalo.rf.gd/chien_lang_2_hd.pdfIn PDF document text
    • http://livofos.epizy.com/what_does_222_mean_in_islam.pdfIn PDF document text
    • http://gomekojesigir.rf.gd/vozimagosesafajexivubo.pdfIn PDF document text
    • http://fagemefixuf.rf.gd/ll_bean_mastercard_guide_to_benefits.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/shimano_dura_ace_9150_di2_adjustment.pdfIn PDF document text
    • http://makuwuwamev.rf.gd/macbeth_act_1_quotes_worksheet_answers.pdfIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/html_open_in_new_browser_window.pdfIn PDF document text
    • http://dimogotewebi.epizy.com/adobe_illustrator_pie_chart_template.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 4964 bytes
SHA-256: 67c97eaacc1feb88a785e46ba74d7c263815d057fcba983281c320d59255ff4f
font_02_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 2316 bytes
SHA-256: 5b91c186c0d2506cbb1932d417fe2e40edf424c68f696d43443a27f8f7fee313
font_03_sfnt_off00011655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11655 2080 bytes
SHA-256: e2a90732539433f5dd37bc00754cb0601bbce1edc0ab696d2d604e6831539b5f
font_04_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 12676 bytes
SHA-256: 115983963134c3c06ca8e90f3b61f8c2b206d785f6e007e9741a291759fe9e7e
font_05_sfnt_off000148dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DD 16296 bytes
SHA-256: bd75291f013b43450e3bf78ee1d6c9ecf190767e04a996465d2c896f7f4d8332
font_06_sfnt_off00015e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E60 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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