Malicious PDF — malware analysis report

Static analysis result for SHA-256 659468f7ffa45768…

MALICIOUS

PDF

71.8 KB Created: 2021-01-06 06:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6effdbadc1f984d0025024e92dbe9954 SHA-1: 96e57fdae1bd225062b37a9a518e51523cdc3566 SHA-256: 659468f7ffa45768813f7657a3d1860be2cd78430f49a68fb6a5a635b40e68ec
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure and a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially harmful content or to manipulate search engine results. The ML classifier also strongly indicated maliciousness.

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
  • 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://gettraff.ru/123?utm_term=talento+de+barrio+english+subtitles In PDF document text
    • https://botutubinev.weebly.com/uploads/1/3/1/6/131637728/xegonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_5fa3ae260a784.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jjiawZn/20168944104.pdfIn PDF document text
    • https://julupoberoraw.weebly.com/uploads/1/3/4/3/134353221/zabimubinofeb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/iigS7gg/pilomatrixoma_on_head_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8a6e1841bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428038/normal_5f9ae9a984263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5fbd1396db99e.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/iFichbO/54507015546.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/8b5d3ae8-5caf-4266-ae00-638ffeedbd51/59643320112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1abfbef-e522-4980-b42c-c4dd6ca4060a/lotus_symphony_dos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96fc470-7130-435e-86d0-704a00c1c15b/filanugedeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/dejawogojoregukuveninaneg.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/50521149087.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_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 5176 bytes
SHA-256: daaa924976e4455fc51290e08303e5d9a1fd515e92d901d8fd2b4ba0704ac37d
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 13252 bytes
SHA-256: 2985721a5a3715ee0992eaf68184b1f8bf0235b5cf13e01a8d2f3186cc058455

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