Malicious PDF — malware analysis report

Static analysis result for SHA-256 096a71b1bbf9405c…

MALICIOUS

PDF

92.6 KB Created: 2021-03-14 01:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1f79e468e605c720592367e67e04e3a3 SHA-1: 7ef2e606258518857bbdc0c7b92c11850db807a8 SHA-256: 096a71b1bbf9405c7a0380152f2cd725f60b27c1df0b218c42bb3a3b7b8612b8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to disposable domains and one specifically identified as a redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://druttle.ru/strik?utm_term=low+calorie+food+list+india PDF link annotation
    • http://rujitexoxobag.mypressonline.com/livodurotusiku.pdfIn PDF document text
    • http://puboreru.22web.org/anemia_ferropenica_sintomas_y_signos.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/how_to_install_samsung_mini_split.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/about_me_bio_template_amino.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/mazijasaferagagoxol.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/why_my_panasonic_tv_keeps_turning_off.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/fojejigigewedomo.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/buwoberi.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/waiting_for_godot_as_absurd_play.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/best_book_for_data_structures_and_algorithms_in_c.pdfIn PDF document text
    • https://zulovinivu.weebly.com/uploads/1/3/4/7/134758195/dojijivesesel.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/dunojixuwaxozoxufujaruteg.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/ralus_xejex_xekamuzono_valizoxigugiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_cf76c8cab451413cb3fa17aa5f88c392.pdf?index=trueIn PDF document text
    • http://ludodugadigepez.rf.gd/english_speaking_course_online_free_udemy.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/2000_jeep_grand_cherokee_misfire_problems.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_9688390878db4d5e81bc20b0b1a3193c.pdf?index=trueIn PDF document text
    • http://jigujirew.epizy.com/girutinoxipatalegukuzo.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/livros_brasileiros_para_jovens.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_64fcbca671034282963e897d3b76f104.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/10676170714.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/76037150459.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_9c2a4afc02084520abea3f4a9cba1c53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/6278029032.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/what_concealed_meaning_does_the_poem_fire_and_ice_depict.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/2018_answer_key_ias.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_off00012c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C86 5048 bytes
SHA-256: 1c742604694330de3802c243ec006487c15d2c1d21ea281797b6b03f0f59ebda
font_01_sfnt_off00013dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDA 11660 bytes
SHA-256: 4d1fd609e0ecbb6e6a52a694ce7a150dc628dd8e017534674e6d74c13a2bac11