Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfacb666fc01973…

MALICIOUS

PDF

74.1 KB Created: 2021-01-06 06:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 015edf1752334344449ef51911f804cf SHA-1: e65d875f47c65494d3e4f71b52a89b3c8c76ca37 SHA-256: ccfacb666fc01973e74681148537fc5558e0bf80b93f19aefec77f5e8953757f
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The presence of an external URI pointing to 'trafffi.ru' suggests a potential command and control or phishing infrastructure. The document body, though heavily obfuscated, contains text related to 'confirmation email template html code', further supporting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffi.ru/aws?utm_term=confirmation+email+template+html+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5f9b7f6818133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8921c347a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f94d74d5b160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_5fd200fa2fbaa.pdfIn PDF document text
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/289bb350b441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5fb5de4a77b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5fad449ce76dc.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/xodupetami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f9f5abf10295.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1383032a-14e0-4de6-9672-16b0210be96e/small_cars_2019_on_the_market.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/phillies_schedule_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eedb25-f16a-4b56-990e-0b077858b731/sams_choice_brown_sugar_spiral_ham_cooking_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/ridexesalobosabudosadir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59df7af3-d163-4c66-8ca9-fbc47bbe5993/lab_7_-_assessment_worksheet_using_encryption_to_enhance_confidentiality_and_integrity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf32b8d-7ba2-4bc3-8fb5-771c5e00df06/sinusarijezepodaras.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_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 5124 bytes
SHA-256: 8b375c4b82720ca6ba69b652667afe052c418b9501e8aeb38005d364e2eabebc
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 10844 bytes
SHA-256: 32d5b91720b3728392a13ebd15d14ec924aabbd8c582d57575cd4d5b80e903da

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