Malicious PDF — malware analysis report

Static analysis result for SHA-256 c944de0a0c61b518…

MALICIOUS

PDF

185.8 KB Created: 2021-05-11 16:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4f142cbfb6ec219857fd88f6371b75e3 SHA-1: 18b54d818c5c3ddc9543b2bc85e6d33006de589b SHA-256: c944de0a0c61b51887d3d23cbd55eeb32f7a28717b1b817649e6114072a2e30d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and an embedded URL. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'The Giver chapter 19 discussion questions', intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=the+giver+chapter+19+discussion+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5fdb9012ce30d.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/70590331574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_606c3cd85d0ec.pdfIn PDF document text
    • http://www19216801.site/555993441952sbnx.pdfIn PDF document text
    • http://xtreme-sport.ru/kamoresolumaguzozke5cz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/63476152473.pdfIn PDF document text
    • http://wegakitiz.epizy.com/dot_net_framework_3._5_setup.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_d592403f38884189b40358df4e1fb55e.pdf?index=trueIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_a06abd93d1ae4808b4d6cfca1b108a00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/lapenaxaxefu.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_c38d8a4b6989414da0ff983011acab3c.pdf?index=trueIn PDF document text
    • http://fofanab.epizy.com/psd_to_ilovepdf.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_1ac9e950b1a4439fafe8241411591b3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/vuposis.pdfIn PDF document text
    • http://zilisugifep.epizy.com/12x20_shed_plans_free.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/xojejadabogepotifunawode.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/xabusof.pdfIn PDF document text
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_1894262583fa4c93aa81c8d724af39af.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28D64 5528 bytes
SHA-256: 193c980ff1e9d2b771ba34e7da9ec33d7250690e3a5df4e806e6bd6d5c05e0ae
font_01_sfnt_off0002a036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A036 13700 bytes
SHA-256: 500f891cade288baca6cb1cfb57ea0029eb3fca022f9dbbfc823e3167c867f16
font_02_sfnt_off0002cb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB4C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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