Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0af33c3fe2bdc87…

MALICIOUS

PDF

65.8 KB Created: 2021-02-10 14:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e66e5685e72def4396e44cb733c0dfc SHA-1: 39a5e2f1bbe1c54165319209721e8b35a91a1860 SHA-256: c0af33c3fe2bdc87592ba4737a98ba0fe812450a6a3a5c16ae9ba03a79cbecd4
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains an embedded URL pointing to a suspicious domain, 'maypoin.ru', which is likely used to host a phishing page or distribute further malware. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=gigantamax+drednaw+guide PDF link annotation
    • http://getchambre.xyz/jagiravapu57a17.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/dviPhdA/mikhail_tal_chess_champion_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478952/normal_600fe4dd91463.pdfIn PDF document text
    • http://cabinetsapp.xyz/high_school_gang_game_android0zd2j.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/funny_prank_numbers_call_freel7qjn.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/bilinear_transformation_solved_examples9tl7q.pdfIn PDF document text
    • https://cdn.sqhk.co/puburikob/yjjz5lZ/tepapulutexulede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_60147473f161f.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/ggqjiIC/detention_pond_design_spreadsheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472182/normal_5ffa8dea6dd48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fc59b77a9810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gateme/cisco_firewall_best_practices_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/agust_d_suga.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/ragnarok_homunculus_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/car_driving_games_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/xarivezugixufizefuxal.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/android_10_gesture_navigation_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/dynamics_crm_365_developer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/30649586351.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FC 4896 bytes
SHA-256: 9d5ef5756e9da58620b2bda3a2686a98221c7b2c664044b9d367cdf22d26b448
font_01_sfnt_off0000c99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99A 10012 bytes
SHA-256: 506196522ce3b3bee1881152eeaa99f98ea6f9345eb945572d5892400b1ca49a
font_02_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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