Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f2377eb1a51b45…

MALICIOUS

PDF

79.9 KB Created: 2021-04-03 11:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 20a37d65b611d02ef962e213521efcc0 SHA-1: 25b42a53ec862e7ed0a2c50301d407aeaf79b1b4 SHA-256: 69f2377eb1a51b45ef111032c58e055851d2159ba5b3251a351eac48a79ee98f
186 Risk Score

Malware Insights

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

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 0.9964

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://golowaki.ru/strik?utm_term=jupyter+notebook+anaconda+windows+10 PDF link annotation
    • https://fuwofinirofen.weebly.com/uploads/1/3/1/6/131637723/145e842f070c961.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/how_to_attach_sleeves_to_a_crochet_sweater.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/1d986b51.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/44063aeb6f0df86.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/how_do_you_motivate_yourself_to_achieve_your_targets_at_work.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/c70b7a5743.pdfIn PDF document text
    • http://karupumad.22web.org/einstein_equation_derivation.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/zijaxanege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad86baa-7a70-4808-9286-2452d37802ce/data_science_certificate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29f39d2-a9eb-4d90-951a-e74cb37a678e/17245667110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dbfae6-1e32-4cd3-aa30-291566d989c2/7165726005.pdfIn PDF document text
    • http://gadejoretalul.rf.gd/talivivejobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bf4d8e-1a62-47ae-a4dd-28f60398e473/93877851124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb71ce18-adf7-4ed8-be99-c4983e6d569f/francis_chan_forgotten_god_study.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/bill_of_sale_for_a_mobile_home_in_california.pdfIn PDF document text
    • http://kusotuwomaru.epizy.com/66762331424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d55b80-5fe2-4976-85a9-3d19919c54a3/the_miseducation_of_cameron_post_film_review.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/dibami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd5f1dd-4d1d-47e7-8084-cdd2c25b2992/89412102794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab5b51e-440b-4dc7-9f82-9506e29962f6/what_are_the_6_tools_of_foreign_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d9cc2c-b924-4005-be82-81621188b0d6/how_to_structural_design_a_building.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9043e4-7897-4864-8886-0c9ecc64d8ca/ridgid_miter_saw_stand_assembly_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6a0d96-e3c7-4f9f-a1a9-e6a9c4f6843b/where_does_social_phobia_come_from.pdfIn PDF document text
    • http://pojafuda.rf.gd/60421600148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2753c9-482d-42cf-becd-159ad472649f/how_to_measure_efficiency_of_a_solar_panel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ee5f51-1e93-4d96-a523-2d4ce7c58cd0/12497591321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a069d6d-37c6-42ca-9634-2f05aa2592a0/libezaxidupaxevilafatuj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 5616 bytes
SHA-256: 00cba812084d6f38cdcd2b39605db017e7d1d0578c782d21802128cc6ff7c0f5
font_01_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 11612 bytes
SHA-256: 792e837fcb2ba177d99f55b880987d86b5867040fd3593cda5e706954e6ea985