Malicious PDF — malware analysis report

Static analysis result for SHA-256 5105adc1254a5abb…

MALICIOUS

PDF

70.5 KB Created: 2021-02-06 10:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 798a674acc5f8e87531bf3ad8a91b478 SHA-1: b6fb383b42d0627f9c1d14b752b23c82352282e9 SHA-256: 5105adc1254a5abbf1ff9a9bbd52b309d59e83ea849dad6bc2f687f138218d0a
184 Risk Score

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
  • 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 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.
  • 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://yafferge.ru/aws?utm_term=photo+beauty+apps In PDF document text
    • https://pezujereg.weebly.com/uploads/1/3/5/3/135349759/mubusubo.pdfIn PDF document text
    • http://obzorov.site/waliniforozypeci.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/2b114c5696a01a8.pdfIn PDF document text
    • https://werafapotavide.weebly.com/uploads/1/3/0/9/130969473/a8324be34.pdfIn PDF document text
    • http://all-system7.work/ejercicios_de_derivadas_1_bachillerab3f82.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/a6fe2.pdfIn PDF document text
    • http://dulexip.22web.org/tapifuraxizu.pdfIn PDF document text
    • http://startask.ru/aukey_true_wireless_earbuds_manualugn4j.pdfIn PDF document text
    • http://zekinaperobivak.22web.org/10_day_weather_report_bakersfield_ca.pdfIn PDF document text
    • http://reduslim-ordina.site/best_tile_material_for_kitchen_backsplash7j7j8.pdfIn PDF document text
    • http://itagreen.fun/simcity_buildit_hack_ios_no_jailbreakz0qib.pdfIn PDF document text
    • http://rezotu.xyz/334461646054vqu1.pdfIn PDF document text
    • http://study-english-04.space/patanjali_medicine_for_dysfunctional_uterine_bleedinglnd8h.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/SYs7Xic/skulduggery_pleasant_movie_watch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xodenumaverap.epizy.com/android_default_animation_duration.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_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 5024 bytes
SHA-256: b5847e428fa30081bfb5c1f9f39133cd6b31fe5e8c44fe490ef31619b8be8d2f
font_01_sfnt_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 10348 bytes
SHA-256: ba598d78acff00e6ed5b84ea14389e1d2fff847ac30e60ebdb7178afc4535eef