Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c43f1875316348…

MALICIOUS

PDF

72.4 KB Created: 2020-11-18 21:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f97600c6d643d8168670bcfbba68d6f SHA-1: 489af7094254bc0c6ad435dc36f2321cbac1061d SHA-256: c7c43f1875316348de8dca5d31b4e60fe33d33e433affb2ec27ca0fd8f0e4710
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for malicious purposes. While no scripts were extracted, the presence of the malicious URL and the strong heuristic detections suggest a phishing or credential harvesting attempt.

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://traffset.ru/123?utm_term=zatarain%2527s+blackened+chicken+alfredo+32+oz+oven+instructions
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fad957b66c46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vikukinumet/rijuzesuza.pdf
    • https://uploads.strikinglycdn.com/files/6670ba5b-72ab-499f-ab57-1c099c19ca72/44111171469.pdf
    • https://s3.amazonaws.com/jimugivos/zelukonejovideta.pdf
    • https://uploads.strikinglycdn.com/files/ae639600-478a-40d6-9d1b-f2ae18f25ce9/daoc_crafting_guide.pdf
    • https://s3.amazonaws.com/besafefaf/69743965051.pdf
    • https://s3.amazonaws.com/povodijirig/madibirugenusetibeva.pdf
    • https://s3.amazonaws.com/pujinit/23388779513.pdf
    • https://s3.amazonaws.com/sukobogixe/80418390772.pdf
    • https://uploads.strikinglycdn.com/files/4937e19a-774c-4f02-b722-467474c27804/dudupizejozasifufele.pdf
    • https://s3.amazonaws.com/wokesabisevo/kenneth_e_hagin_the_believer_s_authority.pdf
    • https://s3.amazonaws.com/besafefaf/35821879167.pdf
    • https://s3.amazonaws.com/ragejufa/29178588094.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d985.bin
725f3dd1adc1a6f216720a69128a178ea95bd7dcbec311b73098a3987205db14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 5708 bytes
font_01_sfnt_off0000ed02.bin
4293503937eab3586882ce5ad2a5d8549419e31e5a467a05b2ea4f5e102d1f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 11608 bytes

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