Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d52f06773d5850a…

MALICIOUS

PDF

73.8 KB Created: 2020-12-25 02:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 90450abd730a0c7e48421b81429c8506 SHA-1: b594cd4a9215cf04f989cefcd3a93cecff5ecdf9 SHA-256: 5d52f06773d5850afb387be2c6c9f2bb4b94ef0e59c8e4aadf2183edf63de249
154 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link that leads to a URL associated with phishing or malware distribution. The embedded content, though heavily obfuscated, appears to be a lure related to a software error, aiming to trick the user into clicking the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://cctraff.ru/aws?utm_term=bluestacks+app+player+error+system+formatexception In PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fe160f523aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f9284ab8324a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/lil_durk_meek_mill_bougie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9d5349-92b4-45a6-8f32-4510af17bfe8/charles_river_bridge_v._warren_bridge_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c86a30-e558-4ae2-ab2e-a97b3c4eeb11/75361397627.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/44378530626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a0df93-2afc-46c2-a867-37f0a0bd1dda/imagimorphia_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16449773-8a8c-4d82-bac1-6734786fb8e2/41949891016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d843dda-505b-4116-894b-c866acab5823/ammens_medicated_powder_at_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/spawn_1997_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985e1122-74f2-4536-821b-26ae2fccec1b/zebepunapef.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_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 5444 bytes
SHA-256: 12ba798b55427158f1e9bcf3fad158c7c9849fe22d45867f9e80b5ea21bb5c65
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 11120 bytes
SHA-256: a62092730ad88edb50b860a5a7ef8aefd8eb78933939fcd28e1ff82d6ce9e0e7

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