Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae3a3db7c34e257…

MALICIOUS

PDF

75.0 KB Created: 2021-04-04 18:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 392a22883abfbe98d8f4ba97bc8ce610 SHA-1: 9f4a5df779907348328dcf4b0fd5e2945ce8573d SHA-256: 8ae3a3db7c34e2572b1474714d23d3dde1898a878aa8773fd8040c026dd2b45a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to 'Anthem blue cross prior authorization form pdf', indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=anthem+blue+cross+prior+authorization+form+pdf
    • https://cdn.sqhk.co/diwiporeb/ijSejsp/ete_sech_moment_meme_sound_buttons.pdf
    • http://pe50off.info/how_much_does_lds_family_services_counseling_costmq455.pdf
    • https://xunitumewotoril.weebly.com/uploads/1/3/4/6/134612341/medagarotamebeget.pdf
    • http://blaugrana.ru/46246015539zarm2.pdf
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/3884084.pdf
    • https://cdn.sqhk.co/mewedenemez/jel17ic/forumofinaxedejetug.pdf
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/supuromufemi.pdf
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/2410166.pdf
    • http://itgermany.net/exercises_for_over_40_males0xmu5.pdf
    • https://kamupusinupe.weebly.com/uploads/1/3/4/6/134691545/lunuzofonum.pdf
    • https://cdn.sqhk.co/goganededem/igkJLge/drag_racing_club_wars_apk_hack.pdf
    • http://batezelokev.iblogger.org/diy_king_size_platform_bed_with_headboard.pdf
    • https://cdn.sqhk.co/pomiziluda/jhihIh2/93253700225.pdf
    • https://cdn.sqhk.co/zetanitanedo/ggghjXP/mefibog.pdf
    • http://toxedixekerej.22web.org/back_exercises_arc.pdf
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/5593176.pdf
    • https://xuxijewurinawux.weebly.com/uploads/1/3/4/6/134699439/297488f55.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xaxisavubuwowa.epizy.com/encyclopedia_judaica_vol_11.pdf
    • http://lemerobumagojox.epizy.com/pipiturejibax.pdf
    • http://vejidot.epizy.com/buvajataxozusubelapogat.pdf
    • http://woduzubede.epizy.com/pazodobewizesibaruxeliru.pdf
    • http://vomovawesojuti.epizy.com/99707932363.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_off0000e51f.bin
23b021aaf7c0108637e2ab7a63c1f34d2124009e4c5888556d5f604564e25a38
pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 5576 bytes
font_01_sfnt_off0000f7f1.bin
07e713980f81bb3845f03d9887faa51cfd0fddf499b57da5f9529dd635496c31
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 10756 bytes