Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe2aeb708e4550a…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 11:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c36ad076ba7423cd9319ce1e1e482571 SHA-1: 1152f0b23ae8bc27d9d696533d2f81ef3d87eae8 SHA-256: cbe2aeb708e4550aac67eb42618fee8e6bd1dcc912f108975e44988da6cb1171
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=how+to+be+mentally+strong+in+golf PDF link annotation
    • http://telovajov.medianewsonline.com/50199892938.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/L3gefDp/4182195024.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/peavey_16fx_mixer_price_in_india.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/GjiNeia/desert_battleground_game_download.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/secret_window_secret_garden.pdfIn PDF document text
    • http://zolepop.mypressonline.com/97628441816.pdfIn PDF document text
    • https://cdn.sqhk.co/sirezozere/i4Ruigj/52775413231.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/B4Z0geX/59835221143.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/Qignqid/gitogalixezitadafela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_0d995d997449467d83e6b83cd384d35e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bd186e-fe67-45d2-aca9-db20364ad553/lg_tromm_washer_wm2277hw_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4068342-2729-4607-a759-224f6e4e10c1/books_like_when_breath_becomes_air.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_e6016811f7864bb6b606e25c91e48538.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_9f602152ae934d728b7e1bcaf8e5a9ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea50e19c-d082-46d4-bfa7-7de66028d72e/gimimuxulixifesap.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/pijiguvidaditogadifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac96f87d-87a4-404a-87d1-1034b55fb71f/database_management_certificate_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/2005_polaris_sportsman_400_4x4_for_sale.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_fc1dd4463da64c53b1f000762d6472d7.pdf?index=trueIn PDF document text
    • http://watusatuvor.myartsonline.com/50355242188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fe050d-8c93-4c11-a2e2-36d2a817e548/bisezaxorobozezotonewa.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/rforme_allocations_chomage_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/jagakuvejubifikut.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_4f47d04bdad44f8b91a4cc73a3172b09.pdf?index=trueIn 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_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 5384 bytes
SHA-256: 8f219ee0c934ac0bfd8b6a5322ec911310d4245c06870bf538423d10fa534806
font_01_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 10448 bytes
SHA-256: b27560242a88681146ece311c28b10e8221d0c10ad3ba75a7f775fbf94e71dc6