Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3819490976c2c1d…

MALICIOUS

PDF

74.0 KB Created: 2021-01-02 02:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b7f8b722b406143ac733c280376144ae SHA-1: 2518cbe5388a4ac32c11d001d8185a0c01444b25 SHA-256: e3819490976c2c1d4c6b5ae20815f9a1fb931a131ec034db171baa3452ef6598
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a "Biolase dental laser manual". No scripts were extracted, but the presence of a malicious URL indicates an attempt to redirect the user to a harmful site, likely for phishing or 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/aws?utm_term=biolase+dental+laser+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f8be74a02546.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/KUEhbcH/mifisuzurizef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5fbe8f4329bc1.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/ihhqiho/sugapumopafaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449974/normal_5fe20d06eb887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f958d06c6ec6.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/Mjcs6gc/crowdsourcing_is_the_process_of_course_hero.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/exhiajj/wechat_pay_logo_svg.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxazazul/FZTge69/voxabibedipib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_5fa92ba5f0316.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/8383063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/32348664022.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/jidito.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/compound_and_complex_sentences_worksheet_grade_8.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B5 5020 bytes
SHA-256: 838af97f381e4d722cb28adb3ec6fd97e3c2616bf7fe48a0903b4c9edda60e58
font_01_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 15212 bytes
SHA-256: d43621faf786cf6c005467668e35c35dbfe7122606bd7ddfbdd3e9b6a4786895

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