Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5775c644781965…

MALICIOUS

PDF

85.3 KB Created: 2021-01-14 12:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66ab838955a0896b43d36352bcd1d844 SHA-1: b50f39c887b04d5cec2872b3649ca3b7cf1bb09c SHA-256: 2d5775c644781965229e894afe9268719cd19754bb92ec0615b40815d8621c7c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external resources, likely to obscure malicious activity or engage in SEO manipulation for phishing. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection suggest a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=commercial+bread+making+process+pdf
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5fa1f1b3033dc.pdf
    • https://cdn.sqhk.co/rowavarop/iigdhhs/68468001403.pdf
    • https://site-1173562.mozfiles.com/files/1173562/plantas_contra_zombies_garden_warfare_2.pdf
    • https://cdn.sqhk.co/figakeves/fXidjhe/moxaweludalivoxo.pdf
    • https://site-1166655.mozfiles.com/files/1166655/bened.pdf
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/vugiweloril.pdf
    • https://cdn.sqhk.co/puvegipuros/6Gioouh/xoputafamulobaboji.pdf
    • https://cdn.sqhk.co/zibusisujij/j7Kgghg/75617394546.pdf
    • https://site-1172684.mozfiles.com/files/1172684/lep_s_world_3_download_apk.pdf
    • https://site-1175130.mozfiles.com/files/1175130/grand_theft_auto_3_rampages_map.pdf
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f9e10e383e8b.pdf
    • https://site-1175229.mozfiles.com/files/1175229/wipexedebawenegaba.pdf
    • https://cdn.sqhk.co/fofotixoz/dGjhicA/lolibuwogikuvid.pdf
    • https://cdn.sqhk.co/kegufamop/IFShjji/business_startup_grants_for_single_mothers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/zobuwubedak/hd_movies_free_kabir_singh.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6e.bin
602abbc5e0479b59b86ef823f50fd07a189e1577eb5830f8e378da75aa99d6d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 5584 bytes
font_01_sfnt_off00010050.bin
d6590dc055f947e5507dae11101f17581ea0a3cba3a5c18aae78e78b7861076d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 10964 bytes
font_02_sfnt_off000125eb.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125EB 16164 bytes
font_03_sfnt_off00013b40.bin
cd63c8be5e4e1770590e44c72babbfc804782005680ff423e0655517055a4719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B40 3028 bytes

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