Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8307e0a5deb62a…

MALICIOUS

PDF

83.0 KB Created: 2020-11-14 15:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f6663ba297d4f3b023ce36d07a3ef48 SHA-1: 15766853f4975c1a71fd47959fe7c1a4e9598cb0 SHA-256: aa8307e0a5deb62aefaa10dc9c7a8c60b2285ec1a452fbfc2c70b626fe0657ff
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/123?utm_term=cisco+call+manager+express+ordering+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f982fbe555f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f930780961df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5faa122a9cf94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9eac4765320.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/paxuvagal/filumodazodowelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755a5d4c-60f3-4ee6-941c-5a09c0d8f153/rezemegelad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc57c6f-eb66-4bb8-94da-ef1c909d83ce/muvimirurefagupeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a470f93-df7e-46c0-a248-934de028fb4f/96215294043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f329abac-2005-451f-9c8e-e37e82aae35d/totopobama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d54278a-74ed-428f-b96f-b8446a6f60c5/bdo_tier_4_pets.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/nukuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3382836-fc8e-4dc9-99b6-f76699687591/79519571482.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/63402603524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa52c82-6f95-481c-ae00-eb37bb1cd592/34833824891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead71df6-3c94-4726-8085-470afaa8c6b1/62054888839.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_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 5288 bytes
SHA-256: b414a7e6b7f67f2b2386dfe8ab6815d9fba26a46b787d1d36fa7492584e77150
font_01_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 12660 bytes
SHA-256: 66b6cb8f60a2b1242f47229623a24939ac065a3d3010a1fbe4db2fd30a696dac
font_02_sfnt_off00013100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13100 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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