Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc77701be02ce88c…

MALICIOUS

PDF

75.9 KB Created: 2021-03-20 09:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1935eb52e6c183797ccd3db8c37c5ebd SHA-1: 91b4e0d1ece58b1c5a8a4e8c18eedae30bc576c2 SHA-256: fc77701be02ce88ca7b074ec95416da01c5a68117c63efa6c1b126b48e4e5130
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing trojan. The document body, though heavily obfuscated, appears to contain product-related keywords, suggesting a lure to trick users into clicking the malicious link.

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://midufefew.ru/wix?keyword=gold%2527s+gym+cycle+trainer+400+r
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/8918937.pdf
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fec7dbc46131.pdf
    • http://naxajogilelog.medianewsonline.com/the_andromeda_strain_movie_trailer.pdf
    • http://tugumefuk.iblogger.org/dozapewul.pdf
    • http://dakavol.22web.org/agile_product_roadmap_template_free.pdf
    • http://ppl-nutrshopfit.website/can_you_put_magic_bullet_in_dishwasheruv9qw.pdf
    • https://static.s123-cdn-static.com/uploads/4486051/normal_5fc762a7a43be.pdf
    • https://kesizimi.weebly.com/uploads/1/3/1/3/131398366/fa9470acc3cf5.pdf
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5fe91d2d9fa09.pdf
    • http://nonretloli.site/george_foreman_how_much_is_he_worthi9kjw.pdf
    • http://roxedizusugu.mywebcommunity.org/fetal_development_month_by_month.pdf
    • http://ourfanz.com/wakosekuranuturxzk9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_ec3070d72a5f4f2fbededbbb5337080c.pdf?index=true
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_ddeac02cd8a34e4b8521d17372baa78f.pdf?index=true
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_e7247098f32a41e28507ae848a9a1cc0.pdf?index=true
    • http://koduwutuvage.onlinewebshop.net/is_anker_a_good_speaker_brand.pdf
    • http://tunozesanapi.rf.gd/clevermind_app_for_android.pdf
    • http://bememikat.onlinewebshop.net/gce_o_level_biology_notes.pdf
    • http://sojopisosifa.epizy.com/11326441534.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_off0000ea45.bin
48a74068287b3a03632c6891df55e210410eda44a5e0c08ece7274cd5bcbf1ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5656 bytes
font_01_sfnt_off0000fd87.bin
5e4d8522924f6b90866f184220f85efd8fabe8473e24e1c969ec60ca79e2cfe6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 10796 bytes