Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bae83fe6791f720…

MALICIOUS

PDF

66.7 KB Created: 2021-02-22 12:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a8603184191c72ed8db22b77920d5f37 SHA-1: 8543dfebb06760058a10c8fe49dedfc86410378b SHA-256: 5bae83fe6791f720b0043d11fac8834665157097d1d4d9a6ab0546d636d3e82f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. The ML classifier also flagged the PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/123?utm_term=computer+ki+visheshta+english+mein In PDF document text
    • http://tur8osale.site/wemanudokudwoia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_6028253dd708b.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/fEh7Imv/bsnl_new_vasantham_recharge_plans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412195/normal_5fcc55650596e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_6021050d5b38e.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/YFBaMih/pizivekiserokosatuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fc94046bc0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/jftrji8/xadiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_601ad3fe8beb5.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/Cgdnhan/sonic_boom_song_baseball.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_602a590d44bdb.pdfIn PDF document text
    • http://mushygushysayings.com/kefagewijmvuk.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/jg2gcjh/butepitinuvewibodinuzufun.pdfIn PDF document text
    • http://allerlo.xyz/nordictrack_s22i_commercial_actressmn9q7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_60249f8b5b316.pdfIn PDF document text
    • http://myfirstsite.xyz/autodesk_3ds_max_2014_keygenhml32.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/regufojalojaza/typhoid_treatment_guidelines_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/a_news_report_about_an_accident_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/qualitative_data_analysis_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/taking_metformin_for_pcos_side_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/16026768575.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/33448102444.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/lefotunagusizowawewo.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_off0000ca74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA74 5260 bytes
SHA-256: 992162728bffbdf83e28128360f70ed7ef8a4243753223c0711627fac7297bcf
font_01_sfnt_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 9700 bytes
SHA-256: 11216fee5ff4d69e1e9f22695d85124f2e060639c12318a5c7f7f0c1838eb7cf

Open this report in the interactive analyzer, or submit your own file for analysis.