Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f45f4defa82b30…

MALICIOUS

PDF

82.7 KB Created: 2020-11-11 17:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d973cfa91a159299f309c6c667862dca SHA-1: 2b962dbab7759f0575c7888d059d75f38b017742 SHA-256: 33f45f4defa82b30ff741e152265bb4a6be8f597726f14336966cb3bd0673e57
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://cctraff.ru/123?utm_term=a+small+carpet+cleaner In PDF document text
    • https://belavapapase.weebly.com/uploads/1/3/4/4/134444277/berawomoz-zobunavawebub-xetalolaru-zamuvijof.pdfIn PDF document text
    • https://ralokokotozupar.weebly.com/uploads/1/3/4/3/134340958/jiwivapik_takamunefemiru_revilafe_dizulem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fa4f1845393b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_5fa693e65c895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f91a92fd32e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5fa1658b2a7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5fa312941f3ac.pdfIn PDF document text
    • https://deroguba.weebly.com/uploads/1/3/4/6/134684347/de331774c73.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/lanubili/rodovijiwovuwuruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f98b82-b16f-41cb-9e03-ca9a83d37ede/63752354229.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/sebupup.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/19259772492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2255664-944b-4431-9437-14ba788c5eef/funny_dog_halloween_costumes_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/food_chain_trophic_levels_worksheet_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bemadelo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F8A 26528 bytes
SHA-256: a45bac3b8579dbd6e47cbe4946de754b45fd8576f214e44816a18b42d558b824
font_00_sfnt_off0000d93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93D 5068 bytes
SHA-256: 6b79acea309250b8c49b789026f57b8709f8c71ee9c073255e3b9ae0031a02e5
font_01_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 10872 bytes
SHA-256: fc82b1180538c0aa2c80e5ec008604dad335513528a910606f8050ff74bdccc6

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