Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5fc7cbf56861e2…

MALICIOUS

PDF

79.7 KB Created: 2021-03-31 17:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb208ecf5c71f85d82941b10e74ea96e SHA-1: d4c83c41a33a56ac3793bad4e7d06bddd8234335 SHA-256: cc5fc7cbf56861e264ebaa840ef89736e9a4283b666a4bc40d090fe86f9ee38f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a secondary payload. No scripts were extracted, but the presence of an external URI in a document classified as phishing suggests a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://lozipotod.ru/123?utm_term=bicycle+thieves+movie++malayalam
    • https://vabudefun.weebly.com/uploads/1/3/0/7/130775589/9945890.pdf
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5fe9f0a3d850e.pdf
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fde4a680d9a5.pdf
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/zoxogukavazulon_zuxipiko_lemexezaro_vozemaje.pdf
    • https://cdn-cms.f-static.net/uploads/4501774/normal_603523f34158e.pdf
    • https://cdn-cms.f-static.net/uploads/4451206/normal_6064628de8830.pdf
    • https://cdn-cms.f-static.net/uploads/4481676/normal_600f1fb90bf05.pdf
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/robanarevajerabuw.pdf
    • https://vonefemupeme.weebly.com/uploads/1/3/5/9/135957005/28d5e71fa2.pdf
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6056bcd251366.pdf
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff1480be4d09.pdf
    • https://cdn-cms.f-static.net/uploads/4450336/normal_6023ea989f740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/risisipajole/28327764656.pdf
    • https://s3.amazonaws.com/votubukaxogilix/farming_simulator_15_free_download_for_pc_windows_10.pdf
    • https://s3.amazonaws.com/xazarujokemus/why_does_the_red_light_flash_on_my_smoke_detector.pdf
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_9e74555f197448c6a3acfc8f2e5b1ddf.pdf?index=true
    • https://s3.amazonaws.com/vogubivajavofu/febrile_neutropenia_asco_guidelines.pdf
    • https://s3.amazonaws.com/jujojomojemiz/kolukodaxus.pdf
    • https://s3.amazonaws.com/buwosevax/95391419884.pdf
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_5c470289bab642a58d1a544c23cf4900.pdf?index=true
    • https://s3.amazonaws.com/sefiwegegagu/simone_weil_quote.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e625.bin
a10acf964a49d64bb8385749b57ec1ab382cd9d44dccec66b09b194a3bd5a506		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 5156 bytes
font_01_sfnt_off0000f795.bin
0c13c499742f63979783627036947e38143f5f01d5f2468d1a5ea00662da46f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10664 bytes
font_02_sfnt_off00011c66.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C66 16164 bytes

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