Malicious PDF — malware analysis report

Static analysis result for SHA-256 b414bdb365937f60…

MALICIOUS

PDF

96.7 KB Created: 2021-04-25 02:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57f0cb0fc77b1f5078079acbc70fac2e SHA-1: 70000f5979b5926243086f76f7ec5155a1a4414c SHA-256: b414bdb365937f6079c8b7ddda72141ef532bdf0e9931d742af27b668274e624
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 0.9995

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://jacksth.ru/strik?utm_term=how+to+draw+a+really+cute+heart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445118/normal_6052d99fe5794.pdfIn PDF document text
    • http://wei-nmvc.com/kali_linux_2018_free4f8c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_601151a348608.pdfIn PDF document text
    • http://big-ita.space/free_spanish_greetings_worksheetgvc59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_604cc48b36b39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_602a52ce70846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5fd0fc58edaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_603a23273f63c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_60350fd0a285f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_600c1cdc3bfa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_6064f0762b8a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_600125bf66aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_601b3111d963d.pdfIn PDF document text
    • http://sunshop.pro/6294038588qhwl2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_6019a8b7b5707.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xakusineba/74947139941.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/95638842397.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/crazy_frog_dance_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/kali_linux_boot_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/20781168730.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/80757009364.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/how_do_you_read_the_levenes_test_for_equality_of_variances.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 5004 bytes
SHA-256: 0314e45cef6984e95d8407eb0224b17b537869979b3c843696c3ab06998a88b4
font_01_sfnt_off00013662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 12224 bytes
SHA-256: 599398598dd319e02578711cf2e852e5a0efcaf5b283047fc8a073c2e1bcde64
font_02_sfnt_off00015fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FCD 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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