Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f806e66bfb4d0d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-04 15:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9ee50dc4b06057bff39484defbbabe3d SHA-1: d8b0e1e77159a31c0069f4386385575f9f95e593 SHA-256: 99f806e66bfb4d0db6083c34aca5eacd8d535e97c80837dd9a2b7bf01f034a2f
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to be related to the search query, suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=what+is+networking+in+computer+class+10 PDF link annotation
    • https://cdn.sqhk.co/rogudokives/fgiOyug/chicken_invaders_5_halloween_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pukikojat/g0dAzUP/simakavebofe.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/gfgiQcC/battleship_north_carolina_half_marathon.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/olhc53S/best_modern_war_strategy_games_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/wgcNicC/world_cup_2014_all_groups.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/iPejsHM/29996314070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a357796f-f1aa-46df-bb8c-4cc0b345bae7/arduino_starter_kit_price_in_sri_lanka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5f0a4e-d1ff-4c49-b0c2-94d14d98e5c5/69451684898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb520f1-cd27-46d2-b12f-906708b8a76b/56966143870.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/vedavexomizir.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/pixabotaniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f80fbc6-ac31-4a72-921b-36a3d73902a2/49125357580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6acb44-248d-4fda-8c46-a8ecb4d6a503/vba_excel_tutorial_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a468c70-9e6b-49c4-966c-0010cf918146/mimemulowaxes.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/bizapesidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4d312a-ce81-4659-9e2a-4559e3b75c34/99823551605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cd9d77-5922-4275-a9f2-bb90071567de/sapuzemulobezaduxado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35e85ea-97c6-4dbb-9233-82fa20e4295a/visaxixerumidogavusax.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/i_want_you_back_michael_jackson.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/castlevania_harmony_of_despair_soundtrack.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5708 bytes
SHA-256: cfdd1f5219135ebf90cc2868fdcf8a17406affbd0a3139c58506338a11db860d
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 10080 bytes
SHA-256: fbcdc8a7be55acdbe766aceb0bc51ba19c0d52884868934e6c5dd26ae30d1891

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