Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6dd7b4374f5767…

MALICIOUS

PDF

71.5 KB Created: 2020-11-19 06:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 606797ab9195dfbc8c9770a10a03122b SHA-1: 12f313495e619499aea5bf33e5813b5285c84f1b SHA-256: bc6dd7b4374f57679930f7f3b5e20286b0caf81e6b43c06f45dd30ba49d5982b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be related to performance evaluation, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=performance+evaluation+definition+in+human+resource+management PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5fb5df515be1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f959c7b8a919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5f9391ae6bedc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5faa7d4d1764d.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/fasanag/beselezaritomidimoguto.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/bighit_audition_singapore_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/46168768042.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/95987293029.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/85893602860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25b5c7f-d9e9-411b-9979-798125ca2b07/jukugidozogabomawez.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/84896460116.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/zonupakobod.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/adobe_acrobat_x_standard_edit.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/baitullah_musafir.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_off0000cdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF3 5380 bytes
SHA-256: d63ee8ea551d313d6c17852e071f01245980738c1556069d036f4787c185eac4
font_01_sfnt_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 9960 bytes
SHA-256: f781afe5861e55332fe904505992b73677ef9c747f265512538d2f311082e4f0
font_02_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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