Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a00d39193cc1bd3…

MALICIOUS

PDF

88.2 KB Created: 2021-03-19 15:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c692055dbe9d678f23333ec4fc0a129 SHA-1: 97699061543a70a174eef0aa99f46aae696d632a SHA-256: 0a00d39193cc1bd341ce2b2538e34d2092ad4cbb5aeb1269020a0c434bd3a9b4
164 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for phishing or malware distribution. The heuristic 'SE_URGENCY_LURE' suggests the document uses language to create a false sense of urgency, encouraging immediate interaction with the embedded links. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure to a malicious site or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/strik?utm_term=nyc+tlc+exam
    • http://tazaros.iblogger.org/tudegipozonupebojimel.pdf
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6012b33f803a9.pdf
    • https://cdn-cms.f-static.net/uploads/4500665/normal_5fe6353f438e0.pdf
    • https://cdn-cms.f-static.net/uploads/4426812/normal_604195cea72ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_cc167ce1ca7843649099c524b725b290.pdf?index=true
    • http://zobotipuzadevi.epizy.com/xofev.pdf
    • http://bikevobo.rf.gd/17071612686.pdf
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_92f26562dc1b40f3830b2443fb4353cd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/599c01a7-d4c2-458e-8062-f4766acc3512/35953286593.pdf
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_3237e6d424a645bd80322394a2385945.pdf?index=true
    • https://uploads.strikinglycdn.com/files/768e73ad-580f-4911-845b-7040875a243f/the_canterville_ghost_movie_1996_trailer.pdf
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_e5615edc937549eea2051281b73adf21.pdf?index=true
    • http://leneter.rf.gd/pukax.pdf
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_c635553f8f224564b7f44befe0991e2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/12b0613c-bf0d-454f-b6fe-dbd75bedb5a8/homelite_179cc_pressure_washer_wont_start.pdf
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_360f5d6fabc84fbb912703a4de95c0b4.pdf?index=true
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_b5c858c797cb4610a16cc8fe263ea7b2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/63ddb583-b7ac-4f83-933f-d2d42f3c2eaa/69889237966.pdf
    • http://kasisexa.rf.gd/fly_fishing_guide_osrs.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_off0000fafd.bin
d24448f62f049dbc893c0942d32534d11ed3d1b260dea651e18e5bdd85fa2c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 4812 bytes
font_01_sfnt_off00010b56.bin
6edd2dc65f8cc0d4bfc465674af3a6957927c9580e196fa1f2ecab0bfce717d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 2024 bytes
font_02_sfnt_off000114ed.bin
df4ca170edf76ae4e24c842fe565ce8f0f67d50ed7208982aeaabe40da79a86b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114ED 11772 bytes
font_03_sfnt_off00013d31.bin
b2a2c577696f2ebd0e88c7ae6a24162d05ecc870e400dbf4cb4be2377295cbe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D31 16408 bytes

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