Malicious PDF — malware analysis report

Static analysis result for SHA-256 f385c5afa388d309…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 00:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f92afac2c20d92ec4da81d41d8c9f2 SHA-1: d85365a9a0a3cf97905f70328178ccedfac65bb6 SHA-256: f385c5afa388d309ac6cb12115f26fa5b0fc0021465511268d7c533f165dde00
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to be a lure related to a search query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+tell+if+a+soap+dispenser+is+foaming
    • https://cdn.sqhk.co/ruwiketi/Qehihiw/my_talking_cat_tom.pdf
    • http://jibitivi.66ghz.com/minomuzukamawadodeka.pdf
    • http://kinerexasuxemo.getenjoyment.net/ielts_writing_task_2_sample_answers.pdf
    • http://gonisavuxur.iblogger.org/the_time_travelers_wife_movie_explained.pdf
    • http://kemutedetabu.scienceontheweb.net/19000530974.pdf
    • http://lodixewovufosa.iblogger.org/beautiful_pink_rose_flower_images.pdf
    • http://vonezejavej.22web.org/76338282712.pdf
    • https://cdn.sqhk.co/sirijunubi/gohhQhc/48265031923.pdf
    • https://cdn.sqhk.co/bitomasijelo/hhidehc/letudejufek.pdf
    • http://lukunezevowazol.sportsontheweb.net/73431178859.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kikukuvikato.myartsonline.com/matura_angielski_rozszerzony_wiczenia.pdf
    • http://zujopafupo.epizy.com/43731365069.pdf
    • http://gedujelorete.rf.gd/english_story_book_download_free.pdf
    • http://dokudaruriwiv.atwebpages.com/16059760577.pdf
    • http://dorofudi.epizy.com/intermediate_microeconomics_and_its_application_11th_edition.pdf
    • https://s3.amazonaws.com/befarekogol/cuando_se_termina_el_ao_escolar_2020.pdf
    • https://s3.amazonaws.com/mosezavor/pekorit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd0a.bin
46690b1edd0c573b1b0d37dc385899ebee6fc10ad05110391a8b44411313a6bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 5416 bytes
font_01_sfnt_off00010f72.bin
79a81967e57fefc17b494fe3c32b99a3f9468c225ed4d92cb9f7094c13562d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 11732 bytes

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