Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f8350b7ea45498…

MALICIOUS

PDF

82.5 KB Created: 2021-02-27 19:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b987d2c3e3fe9229aced1aa29bb646fa SHA-1: 584e942ab5ba3eb5486595d6524387f88a814b09 SHA-256: 98f8350b7ea454982c6ab277c3241487cdfcc7f520c6077d1be92664778b739a
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'guide'. The presence of external URIs and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=guia+de+ingles+basica+pdf PDF link annotation
    • http://potawuzaj.medianewsonline.com/76437791900.pdfIn PDF document text
    • http://discout.online/tl-wr841n_wireless_repeatervdu5r.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/tekogowatutijize.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/how_to_make_a_bridge_with_popsicle_sticks_without_glue.pdfIn PDF document text
    • http://repaircreditscore.info/421479108009ya5.pdfIn PDF document text
    • http://lamovingcompany.com/ninja_warrior_legend_of_adventure_games_mod2wr0v.pdfIn PDF document text
    • http://converstarget.ru/40804750919asxrj.pdfIn PDF document text
    • http://misirabul.22web.org/estrategias_didacticas_del_aprendizaje_basado_en_proyectos.pdfIn PDF document text
    • http://vienvozvrat.site/98593771225uen42.pdfIn PDF document text
    • http://probkin34.xyz/which_sector_is_the_largest_employer_in_nigeriapwsut.pdfIn PDF document text
    • http://homiak.fun/47237899114bc5yg.pdfIn PDF document text
    • http://velimafi.iblogger.org/48835957185.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/from_arabic_to_english_keyboard.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/desovifa.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/atul_maheshwari_admit_card_2019.pdfIn PDF document text
    • http://wofodumav.rf.gd/vejimazitib.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/20434342831.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/char_broil_performance_4_burner_gas_grill_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/alcatel_3026_manual.pdfIn PDF document text
    • http://xufizup.rf.gd/chalo_ishq_ladaaye_movie_full_hd.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_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 5396 bytes
SHA-256: 16673fc7ce6c70e6e9926e14699e9a75ca7cfeff17dff5845f78be1a5f5279e4
font_01_sfnt_off000113e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E7 12068 bytes
SHA-256: e99137fce17dfc709d455a6983952bd99ca05fcbf12dcd61125aaed904f62446

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