Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ff650fb860529f…

MALICIOUS

PDF

78.0 KB Created: 2020-12-27 02:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 146c27a6432fcbb7f0ed759b4ef2db60 SHA-1: 94c6afea58bd77ec7d9e49de0fcdadb4d6912579 SHA-256: 48ff650fb860529fa9a91d27ae4bc4fe0dee822db671e812d52bcb85a0a35763
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=borderlands+2+king+mong+farm'. This URL is likely used to redirect the user to a phishing page or to download a second-stage payload. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it is a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://cctraff.ru/123?utm_term=borderlands+2+king+mong+farm In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5f9f9a1ce215f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5fdec9e2cd7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f91da2f2882a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_5f8e91e3aaa08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f91dd716e627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f9d3ce150846.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dujepav/minamosovufoxavo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/70492138494.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/free_brochure_templates_for_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/xirowutat.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/roripavisosuvizavaxiju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5180 bytes
SHA-256: 2c31ad3d89f5a678ef198b024eea33bc6445ebba80362f88f15afed8892f39d4
font_01_sfnt_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 10560 bytes
SHA-256: 4beafa566fac899f4ad2f6a92e1fa1bedbb1d6e998e5dc12f53508aba398c05e
font_02_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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