Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fc872a4f335d9c…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 12:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4e9be95dc56b17bfdd36d409a5415c2 SHA-1: bb87d416834c67c478caa76ba15ee7ac02b8acbe SHA-256: e4fc872a4f335d9c8e9c7b2c6b06259859a5f632cc0ba6b7fa8e2b2e08792b2f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://midufefew.ru/wix?keyword=chia-ying+lee+height
    • https://cdn.sqhk.co/butexuvokufo/d8Lh7je/8118255982.pdf
    • https://cdn.sqhk.co/vivutazawi/gjeflgd/my_metro_payment_extension.pdf
    • http://jaxebememapi.iblogger.org/65823804477.pdf
    • http://itsnat.space/sex_offender_list_texas_map08qub.pdf
    • https://cdn.sqhk.co/poxofufiko/gXagduz/59749943676.pdf
    • https://cdn.sqhk.co/kawurefeki/JgjdjcS/84231781178.pdf
    • http://mnogoturov.com/gurofazitinuykk0u.pdf
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6025f63e84086.pdf
    • http://winoorama.fun/vizio_e40-c2_power_cordlgsxx.pdf
    • http://jedadenawesezo.iblogger.org/71829423368.pdf
    • https://cdn-cms.f-static.net/uploads/4365660/normal_601f7255d4b76.pdf
    • http://lady-bug.club/11879974247lgodf.pdf
    • http://verenica.net/highland_cathedral_sheet_music_violinae84s.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gopifu/tulofokok.pdf
    • http://kemogozamamov.epizy.com/platform_metallic_silver_shoes.pdf
    • http://wamodaf.epizy.com/gradeup_static_gk_capsule_2020.pdf
    • http://jejivosijej.rf.gd/dovokinilugowevug.pdf
    • http://noworevapetero.epizy.com/finidimolimadelebom.pdf
    • https://s3.amazonaws.com/xafaxotaful/nororuvilisobit.pdf
    • http://vaxinot.epizy.com/mosorepepurezibexivew.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000d8f5.bin
ac9c21f441bb9bc759c6c96a5cc6e193bd5190eaa5f6053496fb2aad3c2890b2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD8F5 6208 bytes
font_01_sfnt_off0000edd8.bin
497fb27308ebbc422e946490366d0ba99d86c25dca1f0fd855da537023b30be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 4508 bytes
font_02_sfnt_off0000fd2a.bin
053e9ddb4d89e1c60ef32e948eece50b838146c69918510e3ed49f4562dc1752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 11340 bytes
font_03_sfnt_off000123cc.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123CC 4324 bytes

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