Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad49237be1c3833…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 05:35:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 043a5153d89256dde77bf6839663683f SHA-1: 504577ef0f128d8188796e246d06e3c3e9aa3319 SHA-256: 1ad49237be1c38332f56e2b8187deabd7176223ec8c1f75f0d7067794ed9694c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or facilitate phishing. The document body, though heavily obfuscated, suggests a lure related to 'html to pdf api github', which is likely a pretext to direct the user to the malicious URL.

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://lozipotod.ru/award?keyword=html+to+pdf+api+github
    • http://zakababonedip.iblogger.org/make_your_own_distilled_water_filter.pdf
    • https://cdn-cms.f-static.net/uploads/4369333/normal_60265b61a5191.pdf
    • http://kadabafomelu.66ghz.com/security_risk_assessment_and_management.pdf
    • https://cdn-cms.f-static.net/uploads/4402712/normal_60252257eb6dc.pdf
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc883be7ef7d.pdf
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5fef983d2be42.pdf
    • https://cdn-cms.f-static.net/uploads/4471514/normal_6041ab5c59cfc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://rodobokojezaga.epizy.com/insulation_compliance_certificate_template.pdf
    • http://wolevovugubim.epizy.com/zombie_survival_movies_on_netflix.pdf
    • http://giwibajoxuriges.rf.gd/1_kilometro_cuantos_hectometros_tiene.pdf
    • https://uploads.strikinglycdn.com/files/027ff662-5c31-4560-a833-8d5ad39ca596/gatiparixirakosikuxig.pdf
    • https://uploads.strikinglycdn.com/files/ce050262-eba7-41f0-8c22-40dd1ed141c2/why_was_girlboss_cancelled.pdf
    • https://uploads.strikinglycdn.com/files/74d3a0af-a696-429e-84d6-0cbefd371f58/sat_essay_score_scale.pdf
    • https://uploads.strikinglycdn.com/files/20643f86-0f9a-4486-a5ae-5133b539a1bf/my_maps_tutorial_2020.pdf
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_26ad9c56788d443e8ca01fa101637460.pdf?index=true
    • http://jufomotapi.epizy.com/jukevijawatuw.pdf
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_bc527e1ab3094c7685a960c315117e87.pdf?index=true
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_0cdfa1edbb394eb4a72482a832d0dc94.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a0eabd3-c1ff-4020-9e48-06e017d94ab0/how_to_seal_plywood_joints.pdf
    • https://uploads.strikinglycdn.com/files/6b5810dd-3c0b-4231-9d3e-207f158a7dd4/html5_and_css3_tutorial_free_download.pdf
    • https://uploads.strikinglycdn.com/files/349de679-4e3f-471a-b03f-ce4cd6494386/tipos_de_sistemas_operativos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daeb.bin
481f595ea9afc5a08f156d8797d590c0241c3ba8bd9cd4bbb0282d944b8d4765		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 4940 bytes
font_01_sfnt_off0000ebb4.bin
9b4b29ab0b88b01b00f170fef413bd5cd80e7bc77acff7f8c782c87e68543eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 9996 bytes
font_02_sfnt_off00010dfb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 4324 bytes

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