Malicious PDF — malware analysis report

Static analysis result for SHA-256 39524137fa4e107a…

MALICIOUS

PDF

66.5 KB Created: 2020-12-17 15:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: cbcd8acc849fcd4d6e4e7cadf4304139 SHA-1: ee9c6d658e9fe5221f3173408161be2e2ce10f3c SHA-256: 39524137fa4e107a4c71acb6a910e6c22469c63547e30ce23dbf2eaf919099b7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'personal introduction powerpoint template free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=personal+introduction+powerpoint+template+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fc4ae6ba7234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5faecf97f04a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450148/normal_5fc953b42e2f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5f91e69994f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8c0a567e1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f94010766f03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcd591c631b2.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/paropabaru/mofedojunodabidage.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fc8b9d3b0f45b2a3d2c4fec/1606990291955/92927838114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de40085-1fb3-48b5-8a77-3f87e341a4a5/34343653153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae6d9f9-c2f1-4b5e-aa6a-f77b11ad02e4/87700525191.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f769ec917750a3d83c85/t/5fc28536145a8629dc0251bd/1606583612209/2379184940.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_off0000c7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EB 5396 bytes
SHA-256: a3bb60371b504a9ae86daf9eb6738d2cf55b1f39a927ec8dc212e5a25fb4643f
font_01_sfnt_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 10284 bytes
SHA-256: 005e18a13cde93672c294a30e4ee33c95ca001fd718a83a6a3ef12e38284b1ee