Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c709ba2314935c…

MALICIOUS

PDF

74.7 KB Created: 2021-01-18 00:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e9cd7b0d8a5a39eedcd06cc3f7549766 SHA-1: 994114bdd73c049881320d4d9253bc3ac8893bf0 SHA-256: 09c709ba2314935c21b9e8d4d9c53fc44b026dfadc3503374f11d667aa3c2356
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various disposable domains, likely to host or redirect to malicious payloads. The presence of a 'download button' lure and the overall structure suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=great+grand+masti+full+movie+2016+download PDF link annotation
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/3254428.pdfIn PDF document text
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/7363903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_5fae632531bcc.pdfIn PDF document text
    • https://fixefukazadutux.weebly.com/uploads/1/3/1/6/131607703/xuvepasulidu.pdfIn PDF document text
    • https://tozikogok.weebly.com/uploads/1/3/5/3/135330875/vebukogarewaxal.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/wusapiwobubiravaket.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/2727697.pdfIn PDF document text
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/sezoge_zuzavavemikivuv.pdfIn PDF document text
    • https://jegiwagoxupida.weebly.com/uploads/1/3/1/3/131379361/gerav-getoxugulovi.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/gebafis.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/bopej.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/2626964.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/vapuj.pdfIn PDF document text
    • https://vefenebef.weebly.com/uploads/1/3/4/8/134885139/ranefavivafebe.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/jamuluvuvava/35593196585.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/alien_vs_predator_capcom.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_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 5892 bytes
SHA-256: 2b8458f63d306d97c71d8798c9a2f4be558491970228e866a196548a863d2d88
font_01_sfnt_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 10380 bytes
SHA-256: 6ca05108afd590cb16d1daf1851b6abe6c5755d77933f42b43e9a26981c9f7c7

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