Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f0792c39142e4e…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 09:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8ac64d4537b5326304dde120ceed5c28 SHA-1: be7c18a6577a566ebf67bbec62baf771e71e317b SHA-256: a4f0792c39142e4e10c86fc3c667d35389a69e3c6512d29826694eb0377a41de
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an external URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to educational content to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/award?keyword=calculating+area+of+irregular+shapes+pdf PDF link annotation
    • http://xerijegodufiw.mypressonline.com/vogamabewofabobufow.pdfIn PDF document text
    • http://crispyset.online/91365583137ac4ag.pdfIn PDF document text
    • http://ledimpress.biz/aashiqui_2_naa_songs_free_hdzzzss.pdfIn PDF document text
    • http://strapslap.online/ruletebanavojujise1c48n.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/jumudilametutixabadu.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/ssb_interview_preparation_books.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/minonepimuneramekanow.pdfIn PDF document text
    • http://topafigo.mypressonline.com/different_types_of_cells_and_their_functions.pdfIn PDF document text
    • http://nashremont.site/does_dunkin_donuts_have_hot_chocolate_k_cupsvdtn0.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/fipekajufekuwufixabixpw4rh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_a0c94924a3ec4571b6810a5acf02318a.pdf?index=trueIn PDF document text
    • https://20d2f084-0b1b-4cf0-9f58-0b75a0228a77.filesusr.com/ugd/e2f197_d98a38731fa242a6bf1307cdf7f6a8f6.pdf?index=trueIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/bac_international_maroc_cours_svt.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/forming_abstract_nouns_worksheet.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_313e4d75e92f49e2bf36701a96343e30.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_e302abd338ac4e448d1854fcb2a62298.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/62000134508.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/nice_guidelines_colorectal_liver_metastases.pdfIn PDF document text
    • http://betakudo.atwebpages.com/budapest_convention.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/55606228542.pdfIn PDF document text
    • http://wepunulirepobi.myartsonline.com/cedaw_optional_protocol.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/26444802198.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mean_of_discrete_probability_distribution_worksheet.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 5320 bytes
SHA-256: 208265538e3e4716ffb66c83af9e00fb505136f78977a141a6946ad646002aae
font_01_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 11192 bytes
SHA-256: 1ba4f57385e2bc4cce2e7469cfc5097cd220e97598f848d41ce657ea58d58659

Open this report in the interactive analyzer, or submit your own file for analysis.