Malicious PDF — malware analysis report

Static analysis result for SHA-256 a795dca996fdf61a…

MALICIOUS

PDF

87.5 KB Created: 2021-04-01 21:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fd014722795b1f885f1037b76580b94 SHA-1: 7260142d0edfbc315f655fb1db9eb0cec025b1b8 SHA-256: a795dca996fdf61a36ce1bd279c9e19d0a9283bbd28ac5ad2929fc5eac022782
104 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended for malware distribution or phishing. The presence of a 'download' button heuristic further supports the malicious intent of luring the user to download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=line+6+spider+2+amp+150+watts
    • http://xofebuledat.scienceontheweb.net/how_do_i_check_the_status_of_my_cdl_in_texas.pdf
    • http://kakorezikudu.mypressonline.com/81212725632.pdf
    • http://joxorapux.22web.org/addition_and_subtraction_of_radicals_worksheet_doc.pdf
    • http://zememor.sportsontheweb.net/81576612749.pdf
    • http://zapitexidij.mypressonline.com/bsava_ophthalmology_manual.pdf
    • http://kutivefivugokev.mypressonline.com/212914856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nagomekivi.epizy.com/origami_bookmark_instructions.pdf
    • http://femavumifixomud.rf.gd/61999462755.pdf
    • https://s3.amazonaws.com/mikibetiv/kagoduwesufibadepujuta.pdf
    • http://romapubimowa.onlinewebshop.net/vufajoxegegam.pdf
    • http://buposubugoromot.rf.gd/sandisk_sansa_clip_sport_rockbox.pdf
    • http://zufomukibataj.rf.gd/47734041665.pdf
    • http://luloxefisamo.rf.gd/what_is_the_meaning_of_community_development_project.pdf
    • http://fofanab.epizy.com/blockchain_trends_2020.pdf
    • https://s3.amazonaws.com/jumedemimo/tirabeb.pdf
    • https://s3.amazonaws.com/sefipa/difebutazi.pdf
    • https://s3.amazonaws.com/wegugus/mezorumiwenimuf.pdf
    • https://s3.amazonaws.com/sasufufa/php_mysql_tutorial.pdf
    • https://s3.amazonaws.com/degagaziv/approaches_of_teaching_english_language.pdf
    • https://s3.amazonaws.com/fogibi/sufasog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010959.bin
46898185554dfd0b2875d746e49fb7c5c0c886a6e500853cbb619aefd04d1dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 5388 bytes
font_01_sfnt_off00011b93.bin
2f12c1aedbe23467a7686d811551ff2eede0459e21c7cf573ef785d4f9bfbf2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 11512 bytes
font_02_sfnt_off0001428c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1428C 4324 bytes

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