Malicious PDF — malware analysis report

Static analysis result for SHA-256 0573302f53b6c6fd…

MALICIOUS

PDF

80.1 KB Created: 2021-03-16 03:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e3e52083d9ae1d3b5c9a0bf826c6b3 SHA-1: 018913e4035c9106601205e0ea89d689932033bd SHA-256: 0573302f53b6c6fd73b62e6a6b2d0b16b33e1fa351ff5657719ede983223a97a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://midufefew.ru/wix?keyword=effects+of+tropical+storms` suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF format and the presence of external URIs often imply the use of embedded JavaScript for malicious actions, such as redirecting the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=effects+of+tropical+storms
    • http://igcopyrightclient.com/timuzewisivanozasamixivcsjd.pdf
    • http://maewallace.com/the_lying_game_sara_shepard_endinglwz6y.pdf
    • https://jutikuned.weebly.com/uploads/1/3/5/9/135966087/meragaramovok.pdf
    • https://cdn.sqhk.co/kobewudojuvo/bghjhfg/71772697125.pdf
    • https://kuxoredekudo.weebly.com/uploads/1/3/4/3/134368385/zotojogosob.pdf
    • https://zoludapi.weebly.com/uploads/1/3/4/5/134528767/zuwosatu.pdf
    • https://cdn-cms.f-static.net/uploads/4386824/normal_603c1f93ccc2c.pdf
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/vojuzodulan.pdf
    • https://cdn.sqhk.co/javeduner/2jdHZig/77294008077.pdf
    • https://cdn-cms.f-static.net/uploads/4408586/normal_601ef646b0b3b.pdf
    • https://cdn-cms.f-static.net/uploads/4418180/normal_602554087c017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_7346590ad2f0430ea33a890a2389acaa.pdf?index=true
    • https://45018570-8385-409a-b0d7-5d0bdfb2022b.filesusr.com/ugd/c34eac_b541d4040b3f44b3842413a49e95c9e4.pdf?index=true
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_9ff400e2d69c497db6faccac923d42bf.pdf?index=true
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_2abf8335141c458d80c45928a2962841.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad4.bin
8ee6512759fe0689fc57781fbe785daee15a0e1b408165e8d689ff961ee07d05
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 5120 bytes
font_01_sfnt_off00010c31.bin
3be39324a2712ca6b60d347a669c993c5eb6e63706c0b3b1d1a215fe793087bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 11776 bytes