Malicious PDF — malware analysis report

Static analysis result for SHA-256 d392ca29177c2f89…

MALICIOUS

PDF

69.4 KB Created: 2021-01-04 20:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c38f0f12b8c903be9e7d64ea40546752 SHA-1: 2a1cd4ab0991dd028f486536d73474e060873940 SHA-256: d392ca29177c2f89c5add42f527745095b85d1d68cfb3e2bb10160cb91c72529
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to 'https://trafficel.ru/aws?utm_term=gld+stock+fact+sheet', which is likely a phishing lure disguised as a stock fact sheet. The document body is heavily obfuscated, but the presence of the malicious URL and the overall classification strongly suggest a phishing attack.

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://trafficel.ru/aws?utm_term=gld+stock+fact+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f8ec36dc9696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f934244eb632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449996/normal_5fe72d7fcb5e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fac41df70461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fd656223bd08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fe63df9e26d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcca6becf27f.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/zufojadibi/kojudugemuparitodavaxiziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe608e1-d23e-4b99-8ced-d533ee912619/phschool_biology_lab_bench.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/bosmere_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa26cc08-f2db-4008-a4d0-93e0da3c9420/caroline_webb_how_to_have_a_good_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cb46b3-5b80-4bcf-a968-fdc0eff93112/clarkfield_pampanga_zip_code.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/fimasivoboli.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_off0000d1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CD 5108 bytes
SHA-256: 45116da8b8673657a26996dd2786aebc23a70ed29ebc14cdfd4fdd4a5bfa136c
font_01_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 11204 bytes
SHA-256: c69a89f6c1d3410d5e1b34f7a0f95a01ab88f254bde6fcbe7d04cd8477265bda