Malicious PDF — malware analysis report

Static analysis result for SHA-256 209d28ba6dd539d8…

MALICIOUS

PDF

73.7 KB Created: 2021-04-08 08:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 28e6e378f76e8155d71625d619a70066 SHA-1: 09b225ff52e22fbdf2d7dec3e81d82eecbfa5438 SHA-256: 209d28ba6dd539d89a61ad718a67dbde682f8f335b9ade05bfc37a633fd33a04
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic identifying it as a link farm. The primary malicious URL, https://ponafet.ru/123, is presented in a context suggesting a lure for sheet music, likely to direct users to a phishing or malware site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/123?utm_term=christmas+carols+sheet+music+violin PDF link annotation
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/wakoforulozuxipevewo.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/lg_steam_washer_wm3988hwa_manual5cu9z.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/lenisexipafi-gegagidisozon.pdfIn PDF document text
    • http://yandex-delivery.cc/wordly_wise_3000_book_6_lesson_9b_answer_keyi33lc.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/dukajevo/jaferenasegor.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_b0d2de53ab8e4680bac41c14ed4cd2ad.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_4ce38b2b219547fe9cb597485ba44a40.pdf?index=trueIn PDF document text
    • http://taxiraxewi.rf.gd/37864328646.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/how_to_transition_in_a_compare_and_contrast_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/41600929566.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_a8d282d745a94d23bd0010aa66a8e138.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_8c50f8d7814e4c168d7e606543901727.pdf?index=trueIn PDF document text
    • http://zomimek.epizy.com/82935772572.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/inductive_deductive_reasoning.pdfIn PDF document text
    • http://xafafomuripag.epizy.com/47909902198.pdfIn PDF document text
    • http://xetoluwe.epizy.com/vcds_lite_usb.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_d9c3c7f9cfad425aa42926c36b4e26d7.pdf?index=trueIn PDF document text
    • http://dowibisewapidon.rf.gd/gumukasatanedodikidujeb.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_6205d34125a24ab7a0922b83ebfb61f7.pdf?index=trueIn PDF document text
    • https://11210a16-d5d1-4e17-93a3-27fbbb12f21b.filesusr.com/ugd/fb658e_02de8680f65441a2af044c6662ccaf0b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5004 bytes
SHA-256: 450bab0bb9d5788c569f8bc28a7d9fb590517fcd753caa8f41b1f069d04a3f0c
font_01_sfnt_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 10164 bytes
SHA-256: 29006b09858b3b69f77d382c42e989cfea837d1b91ce2f53581ad52a73e0ffe8

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