Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c48f5602ebf5db9…

MALICIOUS

PDF

77.0 KB Created: 2021-03-24 00:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b719634685ff3ea2b38b2c34f12fb59 SHA-1: 25c111ead55a403783a86e3223f88df2dd99f957 SHA-256: 4c48f5602ebf5db9c7170827a3fbcbed337164591d596ce731de26929e8126cd
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 of which are designed to mimic search engine results, such as 'font used in hdfc bank statement'. This technique is commonly used to direct users to phishing sites or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=font+used+in+hdfc+bank+statement
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/mezililuru_gatuxegosanoka.pdf
    • http://tigadugutuvatix.mygamesonline.org/2007_honda_civic_si_coupe_owners_manual.pdf
    • https://cdn.sqhk.co/mokevesin/piiiaif/smartphone_virtual_reality_headset_youtube.pdf
    • http://fidesuwuranotif.getenjoyment.net/filmfare_awards_2020_download.pdf
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/e4e3a5add.pdf
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/kotazilen-gozoguruzugemo-dewemalaxeram-jegarezexesu.pdf
    • https://cdn.sqhk.co/lefuwaregew/CWqVcjc/3866116758.pdf
    • https://cdn.sqhk.co/luwesefizi/3hbz4N8/puwuwiwuke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dakafatuvuguviz.atwebpages.com/xoluvajali.pdf
    • http://ruxurosagogaru.epizy.com/wafosaxupalipisalazemu.pdf
    • https://8de17e8c-b43d-4143-985d-773a0aa332b1.filesusr.com/ugd/01f6ad_320087aa5d9244dea706feb7800b9a6f.pdf?index=true
    • http://zovuwazurelezu.rf.gd/fisemabizu.pdf
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_17c8703141e84ca3a74cd091000ca5ab.pdf?index=true
    • http://fepoxojosatomu.epizy.com/48227854103.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_824ce3ec52bc4eae844660dc0261e2ba.pdf?index=true
    • http://peledopa.myartsonline.com/full_body_workout_for_flexibility.pdf
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_48a171deda78446c938956298f326176.pdf?index=true
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_7930b9d9cfd243789ff0d2df4f731c75.pdf?index=true
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_7de2936d369f43b5934687d0d5b0fe85.pdf?index=true
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_3ec11ad8e0a34040b0f76d9984d5fa80.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a0.bin
a803d36e886d2056d138a46b7f1ecf8faecc079a34fc3bb333dfb4318b697f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A0 5292 bytes
font_01_sfnt_off0000e883.bin
565a1597f6895cbeb83827d7fcea269080eb7c6b01c258a2a25ca5cb13e80560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 12240 bytes
font_02_sfnt_off000111f5.bin
a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 16084 bytes

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