Malicious PDF — malware analysis report

Static analysis result for SHA-256 8716e46687fe76d0…

MALICIOUS

PDF

73.5 KB Created: 2021-02-26 21:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e49481bd24434145eb52a606adad123 SHA-1: e770eb3662813ecdb55c1f14790c7ed1a8198a27 SHA-256: 8716e46687fe76d0eb6c767ca642b48a91bfc65f69cdb357ce0b0abb70b0e3c0
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses an advance-fee scam lure, presenting content related to 'medieval europe worksheets 7th grade' to trick the user. The embedded URL, https://vilenefex.ru/wix?keyword=medieval+europe+worksheets+7th+grade, is likely the malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=medieval+europe+worksheets+7th+grade
    • https://cdn-cms.f-static.net/uploads/4369327/normal_60267f81bf02c.pdf
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fef82f89cd4a.pdf
    • http://vuvulusigi.scienceontheweb.net/maroo_of_the_winter_caves_chapter_13_summary.pdf
    • https://cdn.sqhk.co/pavujakorige/agd6jbp/retract_battle_royale_gameplay.pdf
    • https://cdn.sqhk.co/womawuxinuge/2chhDrN/berupig.pdf
    • https://cdn.sqhk.co/lemusezilaz/0mrN9ha/ludebikuvadowo.pdf
    • http://jivusibofonefud.mygamesonline.org/captain_underpants_complete_book_series.pdf
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fc848e8429aa.pdf
    • http://lorakuze.sportsontheweb.net/jejanugukuliwene.pdf
    • https://cdn.sqhk.co/mofokamibe/dfjhgid/diced_chicken_recipes_low_carb.pdf
    • http://tosefabebiribow.scienceontheweb.net/jowilowefatej.pdf
    • https://cdn.sqhk.co/dusawugivepo/3idihaE/idle_world_mod_apk_android_1.pdf
    • http://joteruzawareba.iblogger.org/define_bezoar_formation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bumurulepowele.myartsonline.com/what_is_the_best_starbucks_coffee_beans.pdf
    • http://terofiwewu.rf.gd/kulufegafuguzigago.pdf
    • http://nevulera.epizy.com/street_fighter_4_ce_mod_apk.pdf
    • http://puzulipanaro.epizy.com/majipapizap.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_off0000e27e.bin
024d743019e2efd7a2d3a9dceecfbb68af75fa2efd7374c36dd438c6c0ddd420
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5524 bytes
font_01_sfnt_off0000f56b.bin
beac2e11cfcb151238f11ccb159509838fc37dc0e7933f58c851b25b1d7340de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 10404 bytes