Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2bb1c879f1dfbc…

MALICIOUS

PDF

79.1 KB Created: 2021-05-05 16:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f591c00a4d84d1c2d9369de28a2067a SHA-1: 68d3c30e18e18cb7fcff98d65514c50485965350 SHA-256: cd2bb1c879f1dfbcdffd60f1c90ebad14a4c9da7ba1547bc45d95062c300eea0
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs pointing to potentially malicious PDF files hosted on compromised websites. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

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://refour.dk/wp-content/plugins/super-forms/uploads/php/files/3da6eb5d65ca4bbe845cc8361a252da2/robasukexuzumiki.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/592mubjpj01qlpi3gjodv4pho4/lozisolubixatiril.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7527e57405ccf9601da8f193221653f0/dufox.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/fc53587e3f47777cbf8671ae620ef403/53078830598.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891b9c99409---rebuxulubazonenimepem.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089cb3268926---42036350671.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/035f190f58042ccd013cd3cb151ddeb9/sawusupexu.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/3ac10fd5b2830eb0156ff2a356855a49/28183142524.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/78b36d4d9e0199f0f3deaf4d74d008f6/mafoderukumusetem.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091cfc1d0a84---14587842533.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607395f01288f---52366046976.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607955d7ae6b0---gasiroronimibep.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f1dac058f---sabisesufusugasemupimerem.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4173507c7bde9765589a639a404c3d45/12546771932.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a6ba1673---zerulinik.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b57e1bc74a---3444811047.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8acb461f2---dajomixudive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=bijli+ki+taar+dj
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de3d.bin
446c889a198638f94ecf86e6a6975e4675e1e0028fa84f2c2b1f1022e081951c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 4832 bytes
font_01_sfnt_off0000eebf.bin
bf7a764872b4a710848850626e93210106a324ed44f8593157fb07e8598a4ba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 10892 bytes
font_02_sfnt_off0001143f.bin
0f8fb74a4cc4a24a0903e832effeba2fe37cdf7cc855ad128cc5efe409ed965e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143F 7404 bytes

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