Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcbaedcd4979b84…

MALICIOUS

PDF

78.7 KB Created: 2021-03-20 13:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fab6ffdfd578a0f6649fb6285dca5b24 SHA-1: 9bb349a2578797289ee5d290dbb672fa8a270818 SHA-256: 3fcbaedcd4979b8451be74e979a84345ab8d1f4ef705339b8ca42c1590a30626
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/strik?utm_term=medical+school+personal+statement+examples+sdn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422912/normal_60257cdd82a95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fff92f21e210.pdfIn PDF document text
    • http://mofonuf.medianewsonline.com/louisville_slugger_upm_50_black_flame_pitching_machine_replacement_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_60383ed94ef24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6021d620379e8.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/40627917515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowugatekur.rf.gd/77067678836.pdfIn PDF document text
    • http://favirivesez.epizy.com/prezi_free_templates_workflow.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/mariam_khan_reporting_live_cast_wiki.pdfIn PDF document text
    • http://julajibumomas.rf.gd/gakalif.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/91519397454.pdfIn PDF document text
    • http://nifopufu.epizy.com/alesis_dm10_studio_manual.pdfIn PDF document text
    • http://golofup.rf.gd/what_are_the_disadvantages_of_mobile.pdfIn PDF document text
    • http://debagejusuwaj.epizy.com/oneplus_6_android_10_dark_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/jomese.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/72081690086.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/5353169689.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/29705865496.pdfIn PDF document text
    • http://timusirekinamiz.rf.gd/canon_in_d_violin_solo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/1st_battleship_squadron.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_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 5388 bytes
SHA-256: 6bd640a1ea6d54ee965f66d5703e875eb9a9bf6a295ed293a56e466052040f56
font_01_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 10904 bytes
SHA-256: 76e4e60dc48a46932b27ea97c4899417b7a6d29a86d5a91dcca2637f7552eff0

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