Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f342698860c43d3…

MALICIOUS

PDF

106.3 KB Created: 2021-03-09 20:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fc8153f165a7c6e0114fa385d8ba923 SHA-1: 1aa794c20fc7d35821a2088aa1e427d0417ae761 SHA-256: 0f342698860c43d30408d246a5302962023fefdb46951039657d365004063c42
136 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, with heuristics indicating an advance-fee scam lure. The document body, though heavily corrupted, contains references to 'Green bay packers 2020 schedule pdf' and authoring information suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple external URLs, including one pointing to 'kuzutuzo.ru/award', strongly suggests a phishing or scam attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/award?keyword=green+bay+packers+2020+schedule+pdf
    • http://manekobe.22web.org/format_code_visual_studio_mac.pdf
    • http://mizusowe.66ghz.com/2769030427.pdf
    • https://cdn.sqhk.co/jakatote/cHmWZ59/26417179327.pdf
    • https://cdn.sqhk.co/motuvitewodi/GifjiR4/tofolo.pdf
    • https://cdn.sqhk.co/vukebomuwan/jf0jjhf/chouzetsu_dynamic_sheet_music.pdf
    • http://walkover.me/definitions_of_educational_psychologye1zke.pdf
    • http://viewcreditscore.info/what_does_the_raven_mean_by_nevermore435y2.pdf
    • http://alphabitx.com/84039137588vpb7o.pdf
    • http://mefuxorimuba.22web.org/pobifutapakiza.pdf
    • http://retapadu.medianewsonline.com/96201750310.pdf
    • http://xoxuvajes.mywebcommunity.org/sketchup_2014_tutorial_free_download.pdf
    • http://azorocheat5.xyz/kalyana_malai_kondadum_penne_song_free_downloadnkd70.pdf
    • http://lovefoxesi.iblogger.org/95707474458.pdf
    • http://sport-stavki.fun/traffic_reports_m4_westboundqm2j8.pdf
    • http://labincom-med.ru/rudunilodonogij7ps5.pdf
    • http://nutetuxiv.mygamesonline.org/xefasajonanu.pdf
    • http://creditinquiry.info/27447166825vyxhu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_68a6498945244fa5919ba140827f4909.pdf?index=true
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_4adf6a0144ea4348a3768a992d242332.pdf?index=true
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_371e7d17b2c1467f8e3c0b448cb1b95a.pdf?index=true
    • http://jepogedepujadul.rf.gd/maquina_de_algodon_de_azucar_casera_informe.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_off0001546a.bin
c3b0862b305448ab17abb0eb37dd5cf8479b9819f3ca313c5636ba2744a956c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1546A 5500 bytes
font_01_sfnt_off0001671c.bin
72ba9e67d52bbe41c846ffb8d352432eca5aba4ba3b9176bf3b07cbf890eccbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1671C 11276 bytes
font_02_sfnt_off00018da7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DA7 4324 bytes

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