Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e80d1b34a8f2025…

MALICIOUS

PDF

93.0 KB Created: 2021-03-16 09:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5d50c1878bffdcf36f9762361fd562c0 SHA-1: 2bb7cc7d8a5c30b48a294da8b8ab400446a842d9 SHA-256: 8e80d1b34a8f2025e1ac4eaf749d835ee1ad80396fbe58d1754de80774f57550
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to other PDF files hosted on disposable domains or user-generated content platforms, suggesting a link farm for SEO manipulation or to distribute malware. The primary malicious URL identified is https://maypoin.ru/wix?keyword=duratrax+evader+nitro.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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/wix?keyword=duratrax+evader+nitro PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470035/normal_5fdec94c73155.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/carcinoma_de_celulas_escamosas.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/roadmaster_granite_peak_weight.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/braun_series_7_mens_rechargeable_wet__dry_electric_foil_shaver.pdfIn PDF document text
    • http://fijazubelanulek.mywebcommunity.org/catia_v5_guide_book.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/33063355324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6025c6c2ec472.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/bapidenezuzigotibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_4ad7fd4af7f443f8abb8a06a0261ca97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ed287a-a659-4a10-994c-b6061fd9a579/lapufagupu.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_8c07d2e258ef4f0aa72db7d6b21a3f45.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_7c5893f8fabe4d5bbc0c9e2c28de003a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c21db1-d3c3-463a-a3ae-2653b672b45e/aircraft_maintenance_salary_in_philippines_2020.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_244ebb5262a845cc87eea6b565153888.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf055b16-e2df-4f82-bfb0-6b64452eae1e/lyrics_i_dont_care_anymore_rodney_crowell.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_910938d0c5e143db92e51b3765fede3a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e819bf-721f-47fc-8956-fac29284b45f/33935597138.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_17762285987f41b4be4fa8741768d1dd.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_off00013085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13085 4736 bytes
SHA-256: f691e5c1e9d1a82e6d39e55f4289fb625e6b2e9242c76668283b2cddae36c719
font_01_sfnt_off000140ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BA 10552 bytes
SHA-256: 2c9c114053597b67478f9e0b68f5b69a6e1eed748b30d28fb2f9a62517e54dc3