Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8a43c48787119a…

MALICIOUS

PDF

87.5 KB Created: 2021-03-11 07:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 457b6f00ee17860a11caf1ae949c153c SHA-1: da6f003947306f3cc4ca969e401d40b81aceb63b SHA-256: ed8a43c48787119ae6b10926d2c167a65590b825a32f56202d66aab2f6125070
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/strik?utm_term=vias+de+administracion+de+medicamentos+en+animales+domesticos+pdf PDF link annotation
    • http://sawemawe.mywebcommunity.org/retuzopipizijinutojobaj.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/jfhfjc2/jebusotawifanotonafok.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/jgdjaJq/sawiranozukefufoje.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/hbjhSji/angular_6_form_control_name.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/hgifhf0/vabakog.pdfIn PDF document text
    • http://jotaxanalesuti.iblogger.org/83424865106.pdfIn PDF document text
    • http://idealica-official-it.website/mugemalupewaxewesitilufhyx.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/hecRije/treasure_hunt_movie_wiki.pdfIn PDF document text
    • http://subbellassecret.com/68513310377jz0qn.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/hgiiset/16219889520.pdfIn PDF document text
    • http://fixmarker.fun/wordperfect_avery_templatesdoaeq.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/jvidict/plant_and_animal_cell_coloring_worksheet_answers.pdfIn PDF document text
    • http://muzolifuvekimew.22web.org/ecet_old_question_papers_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/gugosobor/djf3jf7/9745303607.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/36042473263.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/33410467286.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/how_to_connect_ps4_gold_headset_to_android.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/jhPmhhn/yoda_dark_side_cave_quote.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/cRQhcgj/galaxy_particles_calm_games.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/salbutamol_inhaler_davis.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/what_are_some_old_country_songs.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
    • http://novosumagib.epizy.com/22058248993.pdfIn PDF document text
    • http://fuxitajudosev.rf.gd/why_is_my_grandfather_clock_not_chiming.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/master_cleanse_results_30_days.pdfIn PDF document text
    • http://mekemiwi.rf.gd/88139674620.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_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 5052 bytes
SHA-256: c9956b58bf489949ccb77863f93141beab334df9ed3c9543f3b8a1a9377f852e
font_01_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 11224 bytes
SHA-256: e95b39126d0fe89e75e7c38ae9efea91749d9107f221f98642c037b5fb27e9cd
font_02_sfnt_off00013fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f