Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b985824c20093f3…

MALICIOUS

PDF

69.9 KB Created: 2020-11-23 22:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f012f03af87e13afd1fa304170a44ede SHA-1: 17be3a48c533ca901a1cf47833fbc5c1b2309859 SHA-256: 9b985824c20093f3a820d2de47a91b5650763ff7abffd498af79d77826a27a68
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 URI pointing to a suspicious domain, traffset.ru, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though partially corrupted, contains text related to "unblocked games", suggesting a lure to entice users to click the malicious link.

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://traffset.ru/123?utm_term=fourth+and+goal+unblocked+games+66 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418171/normal_5f96fbdd638ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f977a76d7b59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f908991a0cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fb847fc45617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f97819eabeef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_5fba8b8268aac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/marvelous_designer_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc070fb-a848-4730-a4a3-cd4263bdc85f/91655513941.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/60691419104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e6ccac-7987-49e5-b5c0-ac68e59957a7/dixidalijavofe.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/what_is_information_processing_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a96462-72c1-4a9b-a934-a8231f0486ce/70705071235.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/bridge_rectifier_with_filter.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_off0000c7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C6 5500 bytes
SHA-256: 976c008ca45fc28101bb0e609ebbbe180174d10ad9623e4f4ce17cb922d44aaf
font_01_sfnt_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 10072 bytes
SHA-256: a7fb746a74c288fe30c662862889e06a1ea212e3b24b762f3f4fd3363a590d1a
font_02_sfnt_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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