Malicious PDF — malware analysis report

Static analysis result for SHA-256 737db2b9a1685173…

MALICIOUS

PDF

72.2 KB Created: 2021-04-25 17:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a151e72a24c8d30db4f731b9ace67b7 SHA-1: 9b758114d40bd4039823881068b96f70be0d258f SHA-256: 737db2b9a1685173850505170838b8f28a4d5ee124a4f1666c3a4abb3ad2d998
96 Risk Score

Malware Insights

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

The file is a PDF that masquerades as a textbook, likely to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution campaign.

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://seumenha.ru/strik?utm_term=physics+for+scientists+and+engineers+3rd+edition+randall+knight+pdf
    • http://kvrovk.xyz/16960648394xs529.pdf
    • http://kasaxeko.mypressonline.com/31678861801.pdf
    • https://rurasudi.weebly.com/uploads/1/3/4/4/134485231/7856506.pdf
    • http://kitukotobov.medianewsonline.com/tikofururinuvoti.pdf
    • https://sedeberelaniku.weebly.com/uploads/1/3/6/0/136030724/773197.pdf
    • https://cdn.sqhk.co/dutimapo/gegeUid/lannister_armor_costume.pdf
    • http://sodaapp.club/wu_tang_clan_hulu_castec3ts.pdf
    • https://cdn.sqhk.co/xivovido/jjbgeha/zombie_roadkill_game.pdf
    • http://merotudonor.mypressonline.com/burger_king_gutscheine_november_2020.pdf
    • http://xogunajeraxuda.mywebcommunity.org/71579055718.pdf
    • https://fewugoxozo.weebly.com/uploads/1/3/4/4/134441687/fc2165.pdf
    • https://cdn.sqhk.co/tizuvuwo/ARtjiid/cartoon_craft_apk.pdf
    • http://tiwimifozukimu.medianewsonline.com/critical_thinking_in_mathematics_education.pdf
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/malunepa-jiranugaxeg-zetopowufakiv-bawofuroxo.pdf
    • http://kufafukedexepix.mygamesonline.org/7987548981.pdf
    • https://jopixumux.weebly.com/uploads/1/3/4/7/134734794/8984638.pdf
    • https://cdn.sqhk.co/fafujedajir/ghhhcDJ/honeywell_barcode_scanner_price_in_bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lolijexejomak/future_of_work_report_uk.pdf
    • http://jabejanaboz.atwebpages.com/descargar_libro_mecanica_vectorial_para_ingenieros_estatica_10_edicion.pdf
    • https://s3.amazonaws.com/mudurixo/84080236362.pdf
    • https://s3.amazonaws.com/simujix/robert_frost_fire_and_ice_poem_analysis.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_off0000daf6.bin
3d45d1246155fb5dcbee574b26a29b05cceddae1a1d203a876c9b83be212ce18
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF6 5748 bytes
font_01_sfnt_off0000ee95.bin
65bc31021e7dcb1bc4da293ef0b192238bec9e6748a20f7ed12da2425084ca29
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 10448 bytes