Malicious PDF — malware analysis report

Static analysis result for SHA-256 c663cb8b21fb86e5…

MALICIOUS

PDF

76.4 KB Created: 2021-03-27 23:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa716ad934ef89a374b224c32481cf4 SHA-1: 744dace51e84a2068b770c860bb133e3a165c896 SHA-256: c663cb8b21fb86e54c8a3e355671555d84cd0e0f4003b0f584d86c2e9b41ab59
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is directly referenced in the document's metadata as 'Finders keepers movie cast', suggesting a lure to a phishing site. The presence of external URIs and the overall detection strongly indicate a phishing or malware distribution attempt.

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://kuzutuzo.ru/aws?utm_term=finders+keepers+movie+cast
    • https://cdn.sqhk.co/nilesatu/jSmTmPL/wupiruperezenuforis.pdf
    • http://1eyvgo.xyz/tufozamumivtomb6.pdf
    • https://cdn.sqhk.co/momugutatok/eVqjihj/wosuraralomonuwitug.pdf
    • http://zaparipajomigi.scienceontheweb.net/casio_g-shock_ga-110mb-1a.pdf
    • http://republvinb.fun/evinrude_9.9_2_stroke_price2xv8k.pdf
    • http://ruxenawuxovogu.getenjoyment.net/31114158610.pdf
    • http://dfahsdfgjsfg.online/91544778600a0gxd.pdf
    • https://cdn.sqhk.co/nemazuwigumo/Ahj2ijO/judgement_night_full_movie.pdf
    • http://vawurabel.mygamesonline.org/behavior_driven_development_with_cucumber.pdf
    • https://cdn.sqhk.co/matijamaj/czhgbZR/toilet_paper_cat_run_game.pdf
    • https://cdn.sqhk.co/bamazaludez/heEchcl/be_the_manager_2021_app.pdf
    • http://lnstagramsupportingcenter.com/fiwofunefanorigovodet9zxrl.pdf
    • https://cdn.sqhk.co/nolagutotato/hd9gfIE/necromancer_condition_build_gw2.pdf
    • http://mavigawika.scienceontheweb.net/what_are_the_types_of_dragons_in_wings_of_fire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aabf0fd3-622f-4f6f-9bfe-b47c3235fad4/risodobevasijanotaw.pdf
    • https://uploads.strikinglycdn.com/files/5fdd3c71-eac8-4d67-9852-d6c1edac7d65/calculus_8th_edition_textbook_answers.pdf
    • https://uploads.strikinglycdn.com/files/49f6fee9-ff94-4382-a959-c5c19136dd38/3081583454.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/bike_race_free_hack.pdf
    • https://s3.amazonaws.com/netinuwa/ballance_full_game_for_pc.pdf
    • https://s3.amazonaws.com/waxapoz/8391060833.pdf
    • https://s3.amazonaws.com/gazivemon/dijenerumujakefilofuredat.pdf
    • https://s3.amazonaws.com/tometubufimopim/mazak.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_off0000ec98.bin
ac8bc1b695d49e760159bc7ea91e8234217e51a6a50804778ad1e890f25ea434
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 5264 bytes
font_01_sfnt_off0000fe73.bin
20878c12e00c77db1e7add46bafb2aaa5fc6672d1b9c720a9b4ef2ed91940ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 11296 bytes