Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b267b8d287a90bf…

MALICIOUS

PDF

121.9 KB Created: 2021-03-18 09:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2e95ba373a8ee25b92ffe455c51c658e SHA-1: 7f20e5351744a5a50336483ccffb570c699d8d7c SHA-256: 3b267b8d287a90bf7e0ca94c97b15667d88cab8891f5d7df409d9b0b3a158731
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/wix?keyword=chili+cook+off+2020+florida PDF link annotation
    • https://subisadorug.weebly.com/uploads/1/3/1/6/131637552/a40c62a502e765.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/ethics_book_7.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/xudevaki.pdfIn PDF document text
    • http://takojebuti.iblogger.org/tasobufunupawalujolugakil.pdfIn PDF document text
    • http://sreda.city/panasonic_plasma_tv_red_light_blinks_13_timespcfqo.pdfIn PDF document text
    • http://juvozukatug.66ghz.com/fundamentals_of_physics_halliday.pdfIn PDF document text
    • http://freds.space/types_of_hemoglobinopathiestjz8u.pdfIn PDF document text
    • http://sbrf.link/14513157171lyz8t.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/goodnight_stories_for_rebel_girls_2.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/53860897612.pdfIn PDF document text
    • http://ru-order-687646765445.art/jovilelegedenuzesurigikafs41o.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/jajerenazuxefo.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/6447217.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/english_for_academic_study_reading_and_writing.pdfIn PDF document text
    • http://loberas.22web.org/wurujini.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/13979674951.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
    • http://pifazudiso.rf.gd/rearrange_pages_online_for_free.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/how_to_answer_tell_me_about_yourself_in_a_university_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6a08b7-744d-45c5-8888-deedef34ed4e/dojelel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714345ef-407b-4543-8aa5-20576497cf98/82425662266.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B1 4776 bytes
SHA-256: b0af72e53225ea0135c54dcf58ccc9c788d36c3a414e1caef71a20249ddc5f91
font_01_sfnt_off0001a7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7EA 10560 bytes
SHA-256: ad30a7e173fca020eb54adabdd4a2bbd5eb0c4270067274d6ab97455e5f8c162
font_02_sfnt_off0001cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBEB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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