Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d9e4f2756fa267…

MALICIOUS

PDF

65.8 KB Created: 2021-01-25 09:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6369e7a2aca2b000bbfc1bb0a714c984 SHA-1: 8e59ddebb4aff094774900902cc30cb6acbd0725 SHA-256: 34d9e4f2756fa2671a5871411e0993d8c08ecc0c1dd9ca8e16dfcf7c3dcfa937
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious or known malicious redirector infrastructure. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malware or conduct phishing. The presence of a malicious redirector URL and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://traffine.ru/aws?utm_term=vivegam+full+hd+movie+in+tamil In PDF document text
    • https://nusazipupuw.weebly.com/uploads/1/3/4/0/134042511/majilalifewupid_sugumojanuzes_kileberel_babiguxanulepi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5fc9b4aee4f0a.pdfIn PDF document text
    • https://famipitep.weebly.com/uploads/1/3/4/3/134355151/96730229f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_600c531fcde64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ffdcd2af2a70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5ff302d7ced80.pdfIn PDF document text
    • https://povoxiguda.weebly.com/uploads/1/3/4/0/134016665/fejexawawuxikowotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423728/normal_5fcc5800d6131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5fec789117004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5fe89ca10ae84.pdfIn PDF document text
    • http://zinobinipote.22web.org/tajizopiwividutix.pdfIn PDF document text
    • https://kuwevezutasozif.weebly.com/uploads/1/3/0/9/130969868/7768562.pdfIn PDF document text
    • https://wojemalivameju.weebly.com/uploads/1/3/0/7/130775107/mesibiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5fe87c1f9afb7.pdfIn PDF document text
    • https://pozuzabo.weebly.com/uploads/1/3/4/4/134432083/xepusobevid-gewodid-laxopi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454422/normal_5fef6d38efd94.pdfIn PDF document text
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/d7f7cbf3b28f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepapasofefo.epizy.com/13560676675.pdfIn PDF document text
    • http://bavidoripo.epizy.com/82057354583.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_off0000c41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41E 5072 bytes
SHA-256: a8d63448108f9a9ecf775e5dcfd2d9cc67135d6a2e5642dab10cc7801a204471
font_01_sfnt_off0000d54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54F 10716 bytes
SHA-256: 005bcbeb0f6ea3d82e3e0e56761b504f953429ecf48acc2265b9a9e9ee1171e7

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