Malicious PDF — malware analysis report

Static analysis result for SHA-256 e038322337959577…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 22:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3d4abd856cfc72b7a9893f071c9127a SHA-1: d7fb7257ef7aeb1454907a5c72ad544404ef29f2 SHA-256: e038322337959577e8ef25469b6214c2feffa9fd928c27f5e58d6c760537e4c7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to programming a Comcast remote. The presence of external URIs and the overall detection by multiple engines strongly indicate a phishing or malware distribution attempt.

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://soxebez.ru/strik?utm_term=how+to+program+comcast+remote+to+soundbar
    • https://static.s123-cdn-static.com/uploads/4413712/normal_5fed46c57f770.pdf
    • https://cdn-cms.f-static.net/uploads/4408995/normal_603045abb3319.pdf
    • https://cdn-cms.f-static.net/uploads/4481520/normal_603bf68a90408.pdf
    • http://henrysavbr.site/venibikixisigdtoip.pdf
    • http://idealica-itufficiale.website/587034530239sdyb.pdf
    • http://barajofa.mywebcommunity.org/how_to_program_seiki_remote.pdf
    • http://mojenisijita.mywebcommunity.org/castrol_edge_5w30_c3.pdf
    • http://veloxezidirexob.iblogger.org/zavuk.pdf
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd36a817e6f0.pdf
    • http://olivamebel.com/what_was_the_military_pay_scale_in_1965qmj23.pdf
    • https://static.s123-cdn-static.com/uploads/4459062/normal_5ff3ce099b0e0.pdf
    • https://cdn-cms.f-static.net/uploads/4384482/normal_604f1c46051cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pebabub.rf.gd/ncis_la_episode_guide_wikipedia.pdf
    • http://gifovujum.rf.gd/66302726592.pdf
    • http://sujosivetobifir.epizy.com/78889283832.pdf
    • http://rirusivinudi.rf.gd/digital_vernier_caliper_specification.pdf
    • http://disoluje.myartsonline.com/ravojofeb.pdf
    • http://kibulirol.rf.gd/the_beatles_album_google_drive.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0e.bin
cb769422350152582ee7bc3cc66a7f1d65ca9b37bfb619148706832b0c99bf91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 5556 bytes
font_01_sfnt_off000101e8.bin
59f27ca981a30fe58d97a6ba038efc78719a5f991856d2d0164bc4db70275c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10624 bytes

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