Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc175a54d42a8cf9…

MALICIOUS

PDF

86.6 KB Created: 2021-03-15 07:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cdeb0d0646bc4567253ac9cbfd9161a2 SHA-1: e959051a6ab365b0fa62fc91b121e2416b2b270b SHA-256: bc175a54d42a8cf9e4fa66ced14f36b8a290cb5d95e76842e6ec85dc5f776947
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a 'chemistry worksheet', indicating a phishing or social engineering attempt. The presence of an external URI and the overall detection by security tools strongly suggest malicious intent, likely to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dugedepap.ru/123?utm_term=ksp+chemistry+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382407/normal_5ffbc4274d39f.pdfIn PDF document text
    • http://dibezoko.22web.org/gajijijotexekumiwekinago.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/13823169895.pdfIn PDF document text
    • http://xepusuxewo.iblogger.org/physics_workbook_for_high_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_6021cf8841829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_5fea3513a6b3c.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/ijjhgjc/dragon_warrior_4_weapons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5fe80c0645e90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481422/normal_5fcf2aa9135dc.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/jdXkxje/ping_pong_vr_download.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/Zp7jfxl/stick_shadow_war_fight_apk.pdfIn PDF document text
    • http://jojenulowivot.22web.org/vilukezebawalosemozexumow.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/wujafivabipo/mamugotizibidusilovizevaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/91080843522.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/mechanical_engineering_lab_reports.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/diccionario_biblico_ilustrado_caribe.pdfIn PDF document text
    • http://tudifilik.rf.gd/36576354742.pdfIn PDF document text
    • http://zevideto.rf.gd/google_calendar_per_pc.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/memolagujuvorodoxumem.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/93105416985.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/bufejenow.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/34183633616.pdfIn PDF document text
    • http://josuxak.atwebpages.com/why_is_my_brother_printer_error_light_flashing.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 4840 bytes
SHA-256: 242da10898ec60a31162afb36a93a013e3a00efaeb347cfccbf33d442742b070
font_01_sfnt_off00010379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10379 11144 bytes
SHA-256: 6c1b7841637b794ec938853f022ec48a85c66a10cd8728ade273f9c1a7424cc2
font_02_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 16128 bytes
SHA-256: 72fce5166b8e067d5ea018ac7fed63531de4c91c98f4f01baea33fc7388f3b1e
font_03_sfnt_off00013ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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