Malicious PDF — malware analysis report

Static analysis result for SHA-256 52088dc15db17ba0…

MALICIOUS

PDF

187.0 KB Created: 2021-03-17 15:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0c2ca32ccba4818bca61071e90ca9e95 SHA-1: 592de1f9bc9f05fe74e2942b86be04445daa1345 SHA-256: 52088dc15db17ba04c30bd19b0a303f2e02ac93476eb62f8727813635ce7d635
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the link farm heuristic point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://lozipotod.ru/wix?keyword=rochester+elementary+school+vt PDF link annotation
    • https://cdn.sqhk.co/kanedufopuma/4jehfhe/ear_agent_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/oifzLBG/2107.pdfIn PDF document text
    • http://momentikshop.space/jupiter_merlin_income_factsheethof4q.pdfIn PDF document text
    • http://tenp-mail.xyz/wulifivolamewuzataa2cw3.pdfIn PDF document text
    • https://cdn.sqhk.co/parepejapoki/f1KibBT/fojamakawawuxizokuso.pdfIn PDF document text
    • http://dontbeshy.xyz/193807647230etsr.pdfIn PDF document text
    • http://exampl1214.com/would_you_rather_questions_hard_grosshmwcg.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/veduzrqxnk.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
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_8d5e10954fbc400aa3d17f2ff442efb4.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_0e3e7fcb877e46b491cbd2467f9b5894.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74bad7b-2f61-40fb-a5db-4af98b1bcb00/stihl_hs45_hedge_trimmer_fuel_tank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56d5137-c05d-4801-98ff-911da669e427/should_i_buy_maschine_mk3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069f984e-5146-484c-b432-d0b2d881c82a/fitoniwufizepegavemoz.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_7ff294267371496fb3c36caf62dabc56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70da1359-e10c-49c2-97c3-b730b1a3a49d/91055323220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39152db-d741-4b7b-bc8d-67217e037020/96621628984.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_3f2e8dc2c064499b96acc9e2fa4fe13e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0580f289-dffe-4a6c-ab9c-80f9ba0e69ff/76591560666.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_6a2fc8379e1c4e43902aa66c144bc086.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae749e2-42a6-415c-aa8b-cb2a5726ecc0/how_do_you_know_when_zagg_keyboard_is_fully_charged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e75c118-7386-4ba2-ae45-347fe67482b2/87347964810.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_off000299bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299BC 4948 bytes
SHA-256: 8c2616db0f92dc83aeaf8f2b439ca3f541c83244cf210bb41427030446a79363
font_01_sfnt_off0002aa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA64 11164 bytes
SHA-256: 5aa433223b9c069e64c0449ea778367bec018e001ddf33f873e27319f7f9cc0f
font_02_sfnt_off0002cfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFDB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361