Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb45cd4997b8c44f…

MALICIOUS

PDF

82.8 KB Created: 2021-03-25 18:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dbee31b928421cf74bfff88fc134b31c SHA-1: 6826ca3643938261ab1d636299ca70047a8bc077 SHA-256: fb45cd4997b8c44faedc6936935fb1d205cf2eb0d445bb11ec5cff5bfbe91114
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one prominent link pointing to `https://midufefew.ru/award?keyword=livre+pour+apprendre+le+japonais+pdf`. This suggests the document is part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. No scripts were extracted, but the structure and heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=livre+pour+apprendre+le+japonais+pdf PDF link annotation
    • https://cdn.sqhk.co/meradipuwiz/zfgdDgj/vupiwixarobu.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/dgggfie/download_game_stunt_truck_jumping_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hhg25Ff/43200609744.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/iWO2GVS/baldi_s_basics_online_free_no.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/8hiGhaX/how_to_acca_membership_certificate.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/Miiphds/63044604209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_ce74b394759d44e1831219f1c738da14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tevigotu/chilango_salad_nutritional_information.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_f5799aed775b4211b4dd9a0e96c2ee5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/the_bell_jar_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/any_video_cutter_free_filehippo.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_7be01ab007194ac09e6e000d86c88474.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/primavera_p6_software_free_download_for_mac.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_06b93ff10c87412bbe81aba7b9173e6e.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_94a9f8e683f543ed9a66cc2b20d3d301.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_dcd8dbc3528c40d4a5de21fffad94238.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivamubug/nutrition_facts_taco_bell_5_layer_burrito.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/60590489520.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/how_to_reduce_cycle_time_in_agile.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_off000103be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 5112 bytes
SHA-256: 446bcc2608f223309b6a2bd83afb46ec1bf8013112c5d00ae67650997057db57
font_01_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 12480 bytes
SHA-256: a0e6cb28de9016b5078706e85594327dcd7c18baf30f8e429a4b0f1506816e7d

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