Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5688abd0df9e3fc…

MALICIOUS

PDF

68.9 KB Created: 2020-11-25 22:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 511fff8a147e512e5524a202db470216 SHA-1: 5013753f52dbc58ddae4ac42610ed130268e38e6 SHA-256: c5688abd0df9e3fc3f5b81502db46751ccb3a002123bb71c03e02d6e73e778bc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a search result for a VPN application. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/wb?keyword=betternet%20vpn%20for%20android%202.%203 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fb71b9e3fcfe.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/naputuzijutizelej.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/03c5979e-764c-4dd7-8c70-3c0bbaf1f16b/thomas_kilmann_conflict_test_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416e4e16-d437-4169-b938-50a0cc0e5daa/fotografa_bakarak_telepati.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/angular_form_dirty_ie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30644541-91e1-40ca-8823-54012a2ae74b/dudasulomogidumo.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/alabaster_girl_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49761b8a-6fe9-40e8-b763-b14d010b6914/octavia_butler_fledgling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3623f83f-cf51-4fda-874d-a28c1cef2c63/4847619069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4782a0d-0b8b-4cd3-8775-d74dd634a00c/nideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002bf46d-152d-4084-9252-9a2929f59d5c/68230310164.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wutuwemuza.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/12663228243.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE6 3008 bytes
SHA-256: b4d6f5990bb5be72e76ea26ef3a4b394bd987394715e4db0781ca2db842f7037
font_01_sfnt_off0000c9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B1 5260 bytes
SHA-256: 2c654bc58bd8af8c569ad206a556135a2d0e34f10678a810b6baeba31e95468f
font_02_sfnt_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 13284 bytes
SHA-256: a786e0ad390444e12348f1457871b3f481e4701094ae08ca788e08f301162ff5

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