Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffda6b00082958b…

MALICIOUS

PDF

73.4 KB Created: 2021-02-24 09:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 89cdb6644921cbc488f4623e68fd9f98 SHA-1: fbcdd3a19d56394dac8a16a185bdc8b2b6302655 SHA-256: fffda6b00082958b72a292c68074251bc0f4021cca68ec95b30b9bc00966f38f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for job earnings information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests the document is designed to redirect the user to a malicious site.

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
  • 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://leonvi.ru/123?utm_term=how+much+do+peterbilt+mechanics+make PDF link annotation
    • http://socialwave.me/10040526499pl5a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fce202deefa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_602e300ed5bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_5fd7dea2589d8.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/jihgEe4/nuzutuxaxawevofuzubalet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5ff7ba60ccc69.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/gggh6TF/screen_recorder_with_audio_and_facecam_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/iijaLji/gesowepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_60228c1aa4973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fdb359935e24.pdfIn PDF document text
    • http://startask.ru/fisitezaruluteduv4tty.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/hJinTkM/89558119471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixaxoka.rf.gd/computing_ppt_template.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5572 bytes
SHA-256: 9c19e6d51e0a525ede84033fd158b00fb93c611f787d081d4c3823b2ee802d61
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 11176 bytes
SHA-256: 803e7836f01a870c4f8e9b411a7ce6444373bd4799e7be0988fe0c1bc5205b54