Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c118efc5beb9e8e…

MALICIOUS

PDF

73.2 KB Created: 2021-04-01 00:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a15ffa18dba238a5f37a98cb1e7a282c SHA-1: 7bce2e1047549b94de7df8421e0d84f696a24841 SHA-256: 3c118efc5beb9e8e8e021b715b6d50232cc216e79eaac81cabf2cc1f7ae8cfc6
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm or SEO manipulation scheme. The primary malicious URL identified is 'https://baarspo.ru/aws?utm_term=business+communication+meaning+in+marathi', which is likely used to redirect users to potentially harmful content. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://baarspo.ru/aws?utm_term=business+communication+meaning+in+marathi
    • https://jewotefajasofu.weebly.com/uploads/1/3/2/7/132741420/puwawotenet.pdf
    • https://rawowoxok.weebly.com/uploads/1/3/4/3/134309987/2710.pdf
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/f672c62c.pdf
    • http://serarudipiwuvon.mypressonline.com/alkanes_alkenes_alkynes.pdf
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/benidar_wabejawow_zajarusenar_detiza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dbca7204-66de-47e9-a386-0bc8991ab2df/lodasaxi.pdf
    • https://uploads.strikinglycdn.com/files/1271f018-dff3-4756-8802-7e6c98756d5c/how_to_install_petsafe_stubborn_dog_in-ground_fence_system.pdf
    • https://uploads.strikinglycdn.com/files/f371d457-002d-4121-bc6c-a80d0a948a08/juverogirigadisekon.pdf
    • http://retinizani.epizy.com/huskee_lt4200_price_new.pdf
    • http://sadoboxijowem.myartsonline.com/cellule_sanguine_schma.pdf
    • https://uploads.strikinglycdn.com/files/b264999f-2e54-4962-b80b-0c2c5ae5cb03/essentials_of_entrepreneurship_and_small_business_management_norman_m_scarborough.pdf
    • http://xosevijus.epizy.com/downton_abbey_season_2_parents_guide.pdf
    • https://uploads.strikinglycdn.com/files/39179efb-3cd4-42eb-99b8-70e342eccaaf/viwasanodanotivitizuwegu.pdf
    • https://uploads.strikinglycdn.com/files/78771475-be36-47ab-8bbb-9e71663b9a98/how_to_delete_bluetooth_device_from_jvc_unit.pdf
    • https://uploads.strikinglycdn.com/files/b4c63cea-bc1b-4b86-bb9c-d65cfa4751ad/77823459844.pdf
    • https://uploads.strikinglycdn.com/files/afc0f778-2ff7-4eb8-9b46-e633d9d4d272/40639417256.pdf
    • https://uploads.strikinglycdn.com/files/5578f288-fd1e-492e-9d10-10aff673987e/what_does_number_606_mean.pdf
    • https://s3.amazonaws.com/falejogajir/47150427171.pdf
    • https://s3.amazonaws.com/wanasuvedigo/julian_date_2021_printable.pdf
    • http://fevejalamozek.epizy.com/kamegosenigerever.pdf
    • 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_off0000e200.bin
d389af0847524970c514ced57cd56066bb2c7697c1b9a3684979d16c8ed5e799		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 5228 bytes
font_01_sfnt_off0000f39e.bin
6b3e16db66bd05487a150ccdcb907026995d3ca97a5db80a336d43a789dbb8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 10620 bytes

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