Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93428510b549b12…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 18:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5cac9808463d91a32bb8e9433a3e3b66 SHA-1: dec3de782fc3181c13b8a6fe9c1d84b742e216ef SHA-256: e93428510b549b1201e0eda97ca54fc220bda38084d5cdc2f22100d7a2c68f4d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to link farms and redirectors, indicating a phishing or malware distribution attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection point towards a malicious PDF designed to redirect users to harmful sites.

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=english+to+spanish+dictionary+pdf In PDF document text
    • https://cdn.sqhk.co/levowexesu/xqgjMvp/fanubevamolazipu.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/arcgis_desktop_advanced.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/sakurotuz_bexiziwel.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/pdf_annotate_ios_app.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/6181414.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/Aichgjg/tetewalawitazakipa.pdfIn PDF document text
    • https://gikuxowatevu.weebly.com/uploads/1/3/2/6/132681634/xitane.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/hhgh5V7/konazijunem.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/nj_driver_license_change_name.pdfIn PDF document text
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/dagumajejerelalabo.pdfIn PDF document text
    • https://cdn.sqhk.co/bupipusojok/ghegiii/run_run_super_v_mod_apk_unlimited_money.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/guwutivupudutu/20829078893.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/jaxogureselodu.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_8ff8847bcb3e4d41905bbb34f866a2dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/best_photoshop_tutorials_2020_for_beginners.pdfIn PDF document text
    • https://0029a690-d003-4268-bdc7-e74daa5a0415.filesusr.com/ugd/a4b355_ff4e5d0cd625495387e46dc9cc376f45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/nusemi.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/walmart_hours_near_me_sunday.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_118ee9f8f93a469a9bf1dc7b61eba7bb.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_f0ad2b5cb8e74e448ae5a1443dbf09aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxunu/63479676360.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/principles_of_ecology_study_guide_answers.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_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 5476 bytes
SHA-256: 83566c82d970758e3ad2cb281a7cb7f1c018119a76e2930a077ea9aa7dfdf6c6
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 12032 bytes
SHA-256: d2e40bfadeb81550256c4a56d4a1313188463adbdb5d9e8d1d8be8c63cc9d55b

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