Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ae1cae2f598756…

MALICIOUS

PDF

117.4 KB Created: 2021-05-15 12:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae98d0cf080720f52ab39f4798111f33 SHA-1: ae2189970bef4b91287f2f6dd1588685828fc48b SHA-256: 60ae1cae2f598756bdcd15aefd29af95efdfab3f57e6ac697271604df93f87bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://baarspo.ru/strik?utm_term=naruto+3rd+databook+stats', are key indicators of the distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=naruto+3rd+databook+stats
    • https://cdn.sqhk.co/zevijevam/Wjgjjd8/goboto.pdf
    • https://cdn-cms.f-static.net/uploads/4458848/normal_600bf0b280f57.pdf
    • https://cdn-cms.f-static.net/uploads/4367617/normal_603a9b893b32a.pdf
    • https://cdn.sqhk.co/kexofodatop/fifaidU/coupon_for_victoria_secret_discount_codes_july_2019.pdf
    • https://majurunonixo.weebly.com/uploads/1/3/1/0/131070356/xagerojub-gafabez.pdf
    • https://jabexigiji.weebly.com/uploads/1/3/2/6/132695602/509097.pdf
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/kuwefojoxugelawedu.pdf
    • https://kixorixoti.weebly.com/uploads/1/3/0/7/130740187/1710925.pdf
    • https://cdn-cms.f-static.net/uploads/4417535/normal_602fba4d60c30.pdf
    • https://gebogezajir.weebly.com/uploads/1/3/4/6/134685536/64880438dc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakekojezutok/free_indesign_brochure_layout_templates.pdf
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_811bd5e68d084c46acecf96ca1d94d19.pdf?index=true
    • https://s3.amazonaws.com/kelukakeb/crash_bandicoot_kart_racing_apk.pdf
    • https://s3.amazonaws.com/xuvamuba/xagepipixizowoz.pdf
    • https://s3.amazonaws.com/vuxalirudidel/free_printable_maths_worksheets_doubling_and_halving.pdf
    • https://s3.amazonaws.com/kodipopujufipig/the_things_they_carried_characters_martha.pdf
    • https://s3.amazonaws.com/mogedozara/how_to_apply_for_llc_ohio.pdf
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_795a7578d5f148449c3e8986c6d50472.pdf?index=true
    • 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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001514c.bin
1d5abf6c4efb38355b8310c62752ed9a2f7b7505893fc2d79c0487926e6e7fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1514C 5124 bytes
font_01_sfnt_off0001628b.bin
9159c3bbe4e617fc6ab21800076b31c718e0e83db4142b903295bba04c9b58a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1628B 6340 bytes
font_02_sfnt_off00017217.bin
c3f07b00fd5ccab3daa0cda4625f76434f543fa7012a6fd11949749ce3f50abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17217 6968 bytes
font_03_sfnt_off000185b6.bin
74dfb8e073b7a7c6b8bcbed52e0392f719cf7ff614bb8b273578560ddd2822a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185B6 11808 bytes
font_04_sfnt_off0001adde.bin
ef108ed98b7355874704ddb78e655a2f5488b88705dba7d3fcf5bd30f23d6b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADDE 17796 bytes

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