Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0d387fda651fe8…

MALICIOUS

PDF

76.2 KB Created: 2021-04-07 15:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918b75e06d7ebb4a88409eaf35b44f62 SHA-1: bcc1b1d17afcac2ce4799c44d3af8d7a75999fd4 SHA-256: eb0d387fda651fe898ca33fdd702db23775d781cfdde9e014034df30db445a71
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'dafemum.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to reference 'Burger King breakfast menu', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=burger+king+breakfast+menu+low+calorie
    • https://cdn.sqhk.co/posojuvapono/gjFibje/winrar_64_bit_windows_10_download_free.pdf
    • https://cdn.sqhk.co/joxipadij/iSibYwj/hmrc_grant_claim.pdf
    • http://lesorurudefige.iblogger.org/adneksa_kulit.pdf
    • https://cdn.sqhk.co/bivuwusim/jggjr2Z/traffic_rider_game_hack_version_apk.pdf
    • https://cdn.sqhk.co/tevotapomow/ggjg76f/time_craft_epic_wars._com.pdf
    • https://cdn.sqhk.co/kutajanode/jkAFkgc/buzitutor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f1473421-a087-42aa-86fe-5b120a0ed95a/63873436398.pdf
    • https://s3.amazonaws.com/zusevamasor/97782858808.pdf
    • https://uploads.strikinglycdn.com/files/cbecfc62-2433-47b9-9f06-1c036a26b57e/duzuminifote.pdf
    • https://s3.amazonaws.com/mudurixo/3571818462.pdf
    • https://s3.amazonaws.com/senodiw/surilasipaviw.pdf
    • https://uploads.strikinglycdn.com/files/03fe725e-f965-4e12-b529-5749850af580/where_is_the_boomerang_in_links_awakening_switch.pdf
    • https://s3.amazonaws.com/bejenosugede/lidomexojus.pdf
    • https://s3.amazonaws.com/roxawo/62681578476.pdf
    • https://s3.amazonaws.com/jiwisi/tuvabirinet.pdf
    • https://uploads.strikinglycdn.com/files/65609e1e-a092-454a-96aa-9fa0fd9ef274/gofuwini.pdf
    • https://uploads.strikinglycdn.com/files/d81b0439-8ed6-442a-a895-5eb6e78970a4/vilupa.pdf
    • https://s3.amazonaws.com/dezajok/82298988917.pdf
    • http://bexipazo.rf.gd/armenia_earthquake_reconnaissance_report.pdf
    • https://uploads.strikinglycdn.com/files/a05c730b-c9de-4e1d-a1a4-158de2b2e359/how_to_get_a_job_at_the_us_post_office.pdf
    • https://s3.amazonaws.com/viwoxuz/adaway_android_pro_apk.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_off0000ea1a.bin
a98cc918201610dd8b220aac9f4e3391307f491395910326f4f372b0db593265
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 5544 bytes
font_01_sfnt_off0000fd04.bin
6b5310d04a2085c6bd907d4c09252eae6f06fb7be72375b3bda2525db322272b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 10936 bytes