Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34f4be8b3896007…

MALICIOUS

PDF

65.3 KB Created: 2021-01-06 10:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1c786b1a0b1c627b6bf4553645155eb6 SHA-1: 5b6928524cac24553fffa39cd793feb89b57d105 SHA-256: d34f4be8b3896007aed431f5a53b66683ec9d3fc814d3bbc617862058b8a93e5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URL, https://trafficel.ru/aws?utm_term=term+life+movie+parents+guide, is present and likely serves as the primary lure for this phishing attempt. The document body, though heavily obfuscated, contains references to 'movie parents guide' and 'wkhtmltopdf', suggesting a social engineering pretext to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=term+life+movie+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5f958ef04fd5a.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/highdhb/radoval.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/gviiPgi/70773870954.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/UPWRlcP/93300048156.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/aee294b6-1fb5-4c02-9574-48d32d97e8b1/22127914797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97930228-08db-44c9-b2c2-808d036412c7/20810283227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540762f2-19d5-465b-9449-1f27bad39514/pipitavudojaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/identifying_parallel_and_perpendicular_lines_in_shapes_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde3e902-4264-435b-857a-fd5c0aa41249/mefobopelikazizawukurumin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcb053b-8005-43b0-8ed3-3d2928c81bbe/bike_race_mod_apk_7._7._22.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d556a04d-18a9-4dd1-819c-f29cf8cb900e/ciip_study_guide_download.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_off0000c475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC475 5372 bytes
SHA-256: 5321a7386589b1aff768c91e3013c6a7787edbc29be20ec26ead48d2c8c81020
font_01_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 10104 bytes
SHA-256: 8264e9eeb473d705a4d5f8ecab5fa5e341f6d9f2efe94a5d897c5a74c659eb4b