Malicious PDF — malware analysis report

Static analysis result for SHA-256 3261dfb7147303e0…

MALICIOUS

PDF

73.4 KB Created: 2021-01-05 06:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 15898f97421c2124a916b1559797c893 SHA-1: 9f443e12ecaa9a9874b4e7a07abd4530437edaf2 SHA-256: 3261dfb7147303e0cb2aba9682a540eb8955d2811c235808abeb5e332ddc147d
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URL 'https://trafffe.ru/aws?utm_term=arbitration+and+conciliation+act+2018+pdf' suggests a phishing attempt, likely to trick the user into downloading further malware or providing sensitive information. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a legitimate document.

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=arbitration+and+conciliation+act+2018+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5ff3065c13508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393900/normal_5fd0d8243a101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5fa0065509dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fab37b4d9068.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/7e37588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fd632916830c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8b2fa8b000f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467300/normal_5ff2c1b1ed66a.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/wipotegadodorek/zesulaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/werukilisomakuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/minute_maid_seating_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/cell_reproduction_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/48842483175.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_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5620 bytes
SHA-256: 35a93a3df03edfaf7ffdf149e25c638b14a0373919cdff90ae5dc6e1f64d9343
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 10484 bytes
SHA-256: b51babb06e8f50b93f416f62a36f20b8c9f5d8dddf212790f859b7e56f55a624