Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28030686e1b8f03…

MALICIOUS

PDF

98.4 KB Created: 2021-05-09 04:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7d094add8d2fae7d41168bbccf45c828 SHA-1: 12d341905df29390ed7c99ef07fd5d5ec1c1ce45 SHA-256: e28030686e1b8f03b1c40b42d0cb6f7aa7e1c09fb425f622f71910a2f0eb3925
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 exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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 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://botokaw.ru/strik?utm_term=best+settings+for+kenwood+head+unit PDF link annotation
    • http://autocredit.moscow/botany_books_for_bsc_free3gffc.pdfIn PDF document text
    • http://vogusazujijufo.22web.org/55776100002.pdfIn PDF document text
    • http://petersikdar.com/bus_rush_game_download_for_laptopona45.pdfIn PDF document text
    • http://hristogrigorov.com/bmw_diagnose_software_rheingoldf4zp7.pdfIn PDF document text
    • https://kefonajivivuz.weebly.com/uploads/1/3/0/7/130776591/ganigatigatidolom.pdfIn PDF document text
    • http://kpovli.ru/python_full_course_bookfuqvn.pdfIn PDF document text
    • http://kismyketio.com/99003718868jzmi0.pdfIn PDF document text
    • http://maselawave.22web.org/boat_us_app_android.pdfIn PDF document text
    • http://bitjoms.xyz/febibtt1hq.pdfIn PDF document text
    • http://wwnews.site/acer_laptop_charger_price_in_qatarufk2s.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/wemirotemegajirosofu.pdfIn PDF document text
    • https://nukijevexumi.weebly.com/uploads/1/3/4/7/134714394/susituzanadubat_rolalenur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_200406b5ec9e4edd90b33f61058d5002.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b5b745-11dd-4179-917a-98c921fe1b47/31754808574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e092d872-f43a-4c22-8986-fa9b409bc9a3/dyson_v7_absolute_user_manual.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_3072d4bb3fdd43129502d0b867fdff58.pdf?index=trueIn PDF document text
    • http://zawanaxakav.epizy.com/cambridge_english_test_a1.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/cambium_networks_epmp_force_180_manual.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_d75008a0035044c78a7c6d89e8d0207e.pdf?index=trueIn PDF document text
    • http://duximepameme.epizy.com/ratatexuzaserufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584fa5d8-b4b3-4ac9-ad90-36f5f6ab9a4e/vomutamusibetonis.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_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 5340 bytes
SHA-256: b13e42e537d081db538fd2448208c5ccc9695608402a836c54e6d4f27057c0a7
font_01_sfnt_off00015085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15085 12424 bytes
SHA-256: 43a8686dd6698a2cd938043c4edaf786fa8518e930e2f010c34d742704cb171b

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