Malicious PDF — malware analysis report

Static analysis result for SHA-256 303047eb50ce254a…

MALICIOUS

PDF

74.4 KB Created: 2021-04-03 04:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e89d1aa2defc7a2a81093c51e4f27af1 SHA-1: f7dc37dd0cd27baa8598054394ba091932e0ed30 SHA-256: 303047eb50ce254acfaf169adf96379cad0c6b12345c3958a8184952fcb1238f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to job searching and application, aligning with a phishing lure. The presence of external URIs and the ML classification strongly indicate a malicious intent to exploit users.

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
  • 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://mezovuduw.ru/123?utm_term=24+hour+answering+service+jobs PDF link annotation
    • https://cdn.sqhk.co/wofazexej/KhaxjfI/island_tribe_3_mod_apk.pdfIn PDF document text
    • http://kmikaerfs.ru/online_digital_marketing_courses_with_certificates_by_google4hqhj.pdfIn PDF document text
    • http://jizefuli.22web.org/arteries_veins_and_capillaries.pdfIn PDF document text
    • http://ingmijn.com/cashflow_quadrant_bahasa_indonesia4hzry.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/4397842317391dfl.pdfIn PDF document text
    • http://salonapp.xyz/como_se_mueven_los_organos_en_el_embarazoicstv.pdfIn PDF document text
    • http://monanuzusud.22web.org/gexorawonokito.pdfIn PDF document text
    • http://hellochildren.online/juxazudoxuxetiseroga12468.pdfIn PDF document text
    • http://card2card.live/devil_may_cry_weaponsp78gr.pdfIn PDF document text
    • http://goropefixujifep.22web.org/brussels_metro_map.pdfIn PDF document text
    • http://fevalugumaj.22web.org/benzilic_acid_rearrangement.pdfIn PDF document text
    • http://usechambre.xyz/house_on_mango_street_online_bookyhxg5.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/RhiigAS/79353354539.pdfIn PDF document text
    • http://lowwsaw.xyz/vatajarulawuvuniruvavooo9ou.pdfIn PDF document text
    • http://trysalon.xyz/fifetalejawokutikeniwil6nxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57926815-e289-4515-9972-66c0e8bf1098/toxegum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ad2f9c-36fb-4006-bb1a-dc7dd1aa31da/zupanewovupokavazoxelolop.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/zoluta.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/the_entertainer_easy_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b03bdb-f7df-462b-8736-09a6968555fc/1268672039.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/14560559270.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/love_marriage_quotes_images.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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 5520 bytes
SHA-256: 7e3fd516403abbfad8e8260735473c9b5188c594b7f5705d8bb02c972c58c7bf
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 10432 bytes
SHA-256: a178c93c2caed836666fca24376e97a395477502dcae88dcce1ea315052b50cd