Malicious PDF — malware analysis report

Static analysis result for SHA-256 42506bafb7bb92ea…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 16:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 27c5543b47985a9a62257923a752a576 SHA-1: 4ec78dabe0552f5abf5831b8458c982ff81b1999 SHA-256: 42506bafb7bb92ea4a9b16775377896031c0d6666b60b8be69c76fad80edbfa4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs and embedded URLs suggests the document is designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains text related to account classification, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/123?utm_term=clasificacion+de+las+cuentas+t+segun+su+naturaleza PDF link annotation
    • http://ozalupa.space/philadelphia_flyers_schedulevh7aq.pdfIn PDF document text
    • http://prodson.space/jisagiribv3uu6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481841/normal_5fc6cbf6927dd.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/864785502482hxqw.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/avoL2he/snake_apple_game_unblocked.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/xinidiboloxowesonotezep.pdfIn PDF document text
    • http://world-wild-shop.com/dhyana_slokas_tamildk97l.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/lyman_black_powder_handbook.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/cTgf0n3/1705324196.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/6gcciag/mofogogiwumo.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/3oMlijK/ice_cream_cart_rental_for_parties_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/handwriting_recognition_system_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/48819547910.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/wasopazimesorewajisup.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/jilirosifepavo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 5144 bytes
SHA-256: 3fe8e8ec6a5b95af6b0c03074aee536f622e9378950ffad0b29ba4cf607a4230
font_01_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 12932 bytes
SHA-256: 98fc3fd88915a03433245d8c449a09ea3773c51e1266d7c722076d5f46c4efb3