Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea71628d6688de1…

MALICIOUS

PDF

97.4 KB Created: 2021-04-01 14:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5b54201bc5b0757f2f799b5d98132fa3 SHA-1: 457ab7649104bdb2ede54582f0224aef59d4fa27 SHA-256: aea71628d6688de12103f42884cc916118daa803f0da490ed170cf58b045cc01
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an external URI pointing to a suspicious domain, likely intended to host or redirect to a malicious payload. The presence of a 'download button' heuristic further supports a social engineering attack pattern aimed at tricking the user into downloading a file. No scripts were extracted, but the overall structure and heuristics point to a phishing or downloader-type PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://midufefew.ru/123?utm_term=gndu+date+sheet+ba+3rd+sem+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369788/normal_605464e0349c3.pdfIn PDF document text
    • http://fito4ka.xyz/how_many_essays_do_you_write_for_med_schoollseu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fd27ae4c8963.pdfIn PDF document text
    • http://allostar.buzz/how_to_connect_jabra_talk_55_to_laptopx02fb.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/wonder_palacio_summary.pdfIn PDF document text
    • http://stavki-na-sport.site/231756771604mqov.pdfIn PDF document text
    • http://bioforcecolumbia.site/45650176472qgv60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416675/normal_5fcf59cf3b6f7.pdfIn PDF document text
    • http://getporte.xyz/nys_dmv_cdl_road_test37hne.pdfIn PDF document text
    • http://icub.tech/32938073955pw6yg.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/kumunuragokasamidusapav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fc57de056aa5.pdfIn PDF document text
    • http://hookup755.fun/old_pac_man_games_for_sale914a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_602c33c235413.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/9446875980.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/82959067473.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/gudizeloxoxinodet.pdfIn PDF document text
    • http://kufalogomisag.epizy.com/68105089251.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/star_wars_d20_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/what_jobs_can_you_get_with_a_masters_of_public_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/the_secret_history_of_the_mongols_quotes.pdfIn PDF document text
    • http://biranon.rf.gd/the_adventures_of_sherlock_holmes_series_1_episode_4.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/94656675663.pdfIn PDF document text
    • http://gezibetaw.epizy.com/mifovijemikerekipe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001567d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1567D 10068 bytes
SHA-256: 529bef73525439e892e9abb0ca71d70557910db37e1b6b6941b083db778d6685
font_00_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 5852 bytes
SHA-256: 6b0e440eb923075008978db776c683fb2318e42cba7b0af1877f71269261a44f
font_01_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000115c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C5 8216 bytes
SHA-256: 54b77ac4cd6dc2104b20b5c9369668102d602865640cecc4e487be9dfb263489
font_03_sfnt_off000130e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E9 10944 bytes
SHA-256: 5fcb974f7bcb0a56cacd68a9e0f8d8a8992c8fddb7678a6905908adf1e1ba52a