Malicious PDF — malware analysis report

Static analysis result for SHA-256 76191593b90e11f6…

MALICIOUS

PDF

84.8 KB Created: 2021-03-25 13:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e05363e65efe90a74c12554f17a75cab SHA-1: 296a630711f32470a506756fea593090db6b6905 SHA-256: 76191593b90e11f6f9ebb034ae3828a96585cddc63db85a9bf1a98f312466448
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary malicious URLs identified are soxebez.ru and kzrovk.xyz, which are likely used for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=a+horseman+in+the+sky+by+ambrose+bierce+pdf PDF link annotation
    • http://kzrovk.xyz/what_is_wrong_with_ontological_argumentzmk8g.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/ruxitonibuihana.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/jcSDhbA/sikexixinuzoxinowetiretet.pdfIn PDF document text
    • https://nogurutofuxuj.weebly.com/uploads/1/3/4/5/134525281/bakoj.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/a7e5f2.pdfIn PDF document text
    • http://aycotoro5.xyz/xodutg3x26.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/hidjdih/desetalikajinusub.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/gdggVth/dash_mini_pie_maker_instructions.pdfIn PDF document text
    • https://pegugaxuxidugif.weebly.com/uploads/1/3/1/1/131164321/nolofalijab.pdfIn PDF document text
    • https://ditoramaw.weebly.com/uploads/1/3/4/7/134724618/db5f5dce.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://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_2f73dd0a17a34bbd990be3e2a2514124.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/startup_nonprofit_business_plan_template.pdfIn PDF document text
    • https://a185788b-6b4d-4ff1-af73-13fe1d58d893.filesusr.com/ugd/d5415a_0fd4c1cbf3b04727bd25064bed02ad95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/56978783983.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/blitzscaling_espaol.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_96f22c5a58be45f49bc2a85e84f63fa6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/21350098691.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/43025154250.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/16266355208.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/how_to_use_vlookup_over_multiple_sheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE789 5448 bytes
SHA-256: b33e6b80451b6526631fd5d0e9991127411d812a7d6826ef1ac14b3fdcd63c2a
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 11892 bytes
SHA-256: 7377587fe5d30510db97740d1693bbf7803907d747e1fa287a51809ad96040bf
font_02_sfnt_off000122d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D3 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
font_03_sfnt_off0001373b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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