Malicious PDF — malware analysis report

Static analysis result for SHA-256 609d3b3c7012f677…

MALICIOUS

PDF

84.4 KB Created: 2021-03-12 00:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e9dfc81328b6dfa10d078f41c42497d SHA-1: 621f84ab77dad94cfb56b9ad823b9d73ab84b080 SHA-256: 609d3b3c7012f677148ef5c017c1287d885114e092fff0bb05d85d94e09ddbe3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'dugedepap.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to interview questions, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=good+interview+questions+to+ask+a+math+teacher
    • https://static.s123-cdn-static.com/uploads/4368486/normal_5fcedc215ae54.pdf
    • https://static.s123-cdn-static.com/uploads/4412582/normal_60052a518f577.pdf
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5fd18ead74432.pdf
    • https://cdn.sqhk.co/zikegasenar/ZchjkoH/sogedaruzelepelugo.pdf
    • http://santaparker.store/271068779161j40q.pdf
    • https://cdn-cms.f-static.net/uploads/4459791/normal_603618bc5edb0.pdf
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fd2a3d619f1e.pdf
    • https://cdn.sqhk.co/netesatova/uEigEgg/flight_simulator_3d_airplane_pilot_game_download.pdf
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5ff679386a0bf.pdf
    • https://static.s123-cdn-static.com/uploads/4374521/normal_5ff3827ec6dd7.pdf
    • http://shtangye.xyz/77184132616r8161.pdf
    • http://keepmaxi.space/gigofakiluguzarifak4ipsu.pdf
    • https://cdn.sqhk.co/jiwonukunav/jfJMAgi/wesopibedodujewapis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wutogugej/416_cat_backhoe_fuel_pump.pdf
    • https://s3.amazonaws.com/jifesu/best_ad_free_alarm_clock_for_android.pdf
    • https://s3.amazonaws.com/falevi/apology_letter_format_for_company.pdf
    • https://s3.amazonaws.com/fekife/the_fall_guy_season_1.pdf
    • https://s3.amazonaws.com/zaxawetawupo/brother_online_user_s_guide_hl-_l2390dw.pdf
    • https://s3.amazonaws.com/warapagefasovi/diary_of_a_wimpy_kid_14_free.pdf
    • https://s3.amazonaws.com/divexikav/apple_developer_macos.pdf
    • https://s3.amazonaws.com/vabedafozo/una_forma_de_comunicacion_no_verbal_es.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e11.bin
90c54b258ea941fa8cf84146cbe40a8a9dadd0873f8351e10ec75cdd732b0583
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E11 5520 bytes
font_01_sfnt_off000120c3.bin
87235da6b566684a353c3533a2090bc78c004046656fa7fdbcafc9591c36aee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 10408 bytes