Malicious PDF — malware analysis report

Static analysis result for SHA-256 03531889da491fda…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 10:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0d7c5f2be9d2e96716355e88fb61f9 SHA-1: 5b5ea7bcec678a6f2753b018c06b54e486505378 SHA-256: 03531889da491fdaa56986a53b4af9a7aba3a922af987f70920417cafbaf8e43
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary malicious URL identified is zajinet.ru, which is likely used to host or redirect to a phishing or malware distribution site. The document's content and structure strongly suggest a phishing or scam attempt, leveraging a fake sale lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=xfinity+dvr+cable+box+for+sale
    • https://cdn.sqhk.co/rivinodati/AIsLmhc/car_driving_games_hill_climb.pdf
    • http://luminar3-download.xyz/vazudorejmap12.pdf
    • http://italdom.fun/bokewosevinenheu6.pdf
    • http://retys.space/what_size_generator_to_run_hobart_210_mvphmkkx.pdf
    • http://wegutamozeji.iblogger.org/vonubaseredajog.pdf
    • https://cdn.sqhk.co/kusonemap/hbidUjf/videos_engracados_para_whatsapp_download_gratis.pdf
    • http://vbruti.site/google_chrome_apk_app_freelm8yq.pdf
    • http://tamakar.tech/92610167331jdjd0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_100e49ac482e4aa4bd62da0a2523cbe2.pdf?index=true
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_014f42409ad94a17981fe4f5f6446273.pdf?index=true
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_2e3d413535b54f4abcc93bb5db9fb9d1.pdf?index=true
    • http://lefamuredemupi.epizy.com/5820396256.pdf
    • https://uploads.strikinglycdn.com/files/7db1f525-ca68-4915-9245-0e0f2ded778a/where_abroad_is_warm_in_march.pdf
    • http://bovapefe.epizy.com/25867917522.pdf
    • http://vipewonenelo.epizy.com/creative_writing_handbook_free.pdf
    • https://uploads.strikinglycdn.com/files/6b490b59-e77a-43dc-9e89-7390ab221478/17738574238.pdf
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_b82b875b7c584c468710dd049277e263.pdf?index=true
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_4bc1226b129d4b92be98fd2d43860cb9.pdf?index=true
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_f9fd6acbfd804285a42150734ecbe4ec.pdf?index=true
    • http://nowaginog.epizy.com/auditing_legislation_and_standards_2017.pdf
    • https://uploads.strikinglycdn.com/files/eceae0c1-7a9b-4bba-aa29-36957ce6f63c/53016795038.pdf
    • https://uploads.strikinglycdn.com/files/682d765c-0b90-4a7f-8705-3f30e6c1a948/kafesirobebofi.pdf
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_8653110b7a184c73ad0208dbe176f4cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/159e24ca-0391-499a-bd0c-4daa559aa674/adding_and_subtracting_fractions_worksheets_with_unlike_denominators.pdf
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_c21beb6785ac4c6aae0fabb4b7ffe7d4.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0be.bin
f5b7c7120577bdf34bb2082524ff83da23d041f8c80ded4ed05ee50f201dd4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 5360 bytes
font_01_sfnt_off00010315.bin
73194cabd3861a5a754f9b0a071dafbc46537540a48baa333bf0723b5b92fc5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10500 bytes

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