Malicious PDF — malware analysis report

Static analysis result for SHA-256 59780c50ef54a414…

MALICIOUS

PDF

106.2 KB Created: 2021-06-06 22:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 304a6399528d9e7da0850535fa1ae160 SHA-1: e2e0d4745da2ad6c1c53206e34561d2a79022e05 SHA-256: 59780c50ef54a414f924ef1f233bcfe21e053c9f7c1c245cc11336e18ab40f89
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'allytemp.ru', suggesting it is used to redirect users to a potentially malicious site. The presence of external URIs and the classification as a phishing trojan strongly indicate a phishing or malware distribution attack pattern.

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://allytemp.ru/pbw?utm_term=history+of+sayaw+sa+bangko+folk+dance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498994/normal_605bbd8bd6d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_60293e5839a4a.pdfIn PDF document text
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/3648038.pdfIn PDF document text
    • https://werafapotavide.weebly.com/uploads/1/3/0/9/130969473/fitiku.pdfIn PDF document text
    • https://xusuzipurojovup.weebly.com/uploads/1/3/4/3/134325257/2929800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_60206ebf01d8b.pdfIn PDF document text
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/2248931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fceda21f3224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fccba0d6292c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_603949b965237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://vananizi.pbworks.com/f/vafojukikinotomesanukuvof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27006d12-6490-4fef-8f43-db90688028ad/what_kind_of_oil_does_a_yamaha_kodiak_400_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c0fa49-9346-424c-b074-adfa71ce336c/the_atomic_power_of_prayer_and_fasting.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/37580132287.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/ridos.pdfIn PDF document text
    • http://niluputevi.pbworks.com/f/novena_rosa_mstica_da_1.pdfIn PDF document text
    • http://jevibufile.pbworks.com/f/samsung_tv_remote_bn59_codes.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/w/file/fetch/144510651/regresion_lineal_estadistica_ejercicios_resueltos.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 3380 bytes
SHA-256: 24989ccbeda9571e2941f8eeb2a4590b7a9b94989cec9b988298b97e20ced631
font_01_sfnt_off00014fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDE 5548 bytes
SHA-256: 23958dd166e88ca387a4930b0872de646f542032b450a02f57f55bd5847fe7f8
font_02_sfnt_off000162dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162DC 6328 bytes
SHA-256: ee8b682d0e0e4f342894da1e7dae5e0cd2612ff4d28ed5819ba4f948726fd32c
font_03_sfnt_off0001731b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1731B 11856 bytes
SHA-256: 7315481ea5c612a860b8545c710d9ddbae996ff18d0458dcf10c47d87bc555d7

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