Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3dd997bde852c76…

MALICIOUS

PDF

70.7 KB Created: 2020-11-24 08:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ba57775e293c6a90648562092f5eceb2 SHA-1: 694fdd2f2b43ca266f867f96e881884efce1e8ae SHA-256: c3dd997bde852c76f59119a4638d6027442e99f162a55b95fcde73cc93896ccf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://traffnew.ru/aws?utm_term=business+information+modelling+level+2', is flagged as suspicious and likely leads to a phishing or malicious site. ClamAV detection and ML classification further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/aws?utm_term=business+information+modelling+level+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5faf7a7a6fbbf.pdfIn PDF document text
    • https://mefomenixa.weebly.com/uploads/1/3/4/2/134235772/mufapirovadadip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5fbc9cb24c64c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a10025-80f3-47b8-82a5-e8b83c8c732f/50733633575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e354b491-9c4b-4fb1-8a07-db71b153bd45/58729432046.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/mckamey_manor_waiver_copy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9175c0-821c-4121-a57a-ea40e3311999/systematic_theology_wayne_grudem_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/betepijop.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/75694322186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9d9d69-8097-481e-82c6-bc213df3fa2b/5610776719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359db494-71cd-4b23-9073-b1db8598677f/16319311121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea8ff6d-868d-4253-948e-5107db53a591/xegitadafaga.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_off0000d82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 5468 bytes
SHA-256: 6189b5a3a1c221ca573b79b223af227748414317a1756f5a170aa47fafd62048
font_01_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 10224 bytes
SHA-256: 121957be7563033dc01d9ff14ba532a0de6648ff89b66940fc5aaec655f82081

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