Malicious PDF — malware analysis report

Static analysis result for SHA-256 3409c54960908e3c…

MALICIOUS

PDF

80.5 KB Created: 2021-05-07 17:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9464189e6e02f78308d771023cb53934 SHA-1: 704ed5f25aa8b460cf7acb41238b45b3ff6b10d6 SHA-256: 3409c54960908e3c3d98b9fa3737d96780acc5d0f693561225a4d8f44922ec99
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 0.9997

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://jottigo.ru/strik?utm_term=breville+the+juice+fountain+compact+juicer+review PDF link annotation
    • http://thepropheticapp.com/nice_guidelines_htn_in_pregnancys9xwg.pdfIn PDF document text
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/tejigozakigut-mitovazog-bimos.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/rileruwat.pdfIn PDF document text
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/seguzuxubu_dexos_nafigimuvajogu_valedurud.pdfIn PDF document text
    • https://webijizili.weebly.com/uploads/1/3/4/6/134609257/jimevonajov-xerakinib-zeziwi-mobiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_6015bea169fa6.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/1606123.pdfIn PDF document text
    • https://zaxadumumuguxe.weebly.com/uploads/1/3/1/4/131454216/3d5a73f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6021d3375aaf8.pdfIn PDF document text
    • http://haustova.com/shakespeare_macbeth_act_1_scene_3_translation7o4a7.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/292961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482418/normal_5fd1df2f8f50d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fcc5078579ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_56b02e4ab2974c0fa85b43272fe4d034.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3a078c-e49a-4219-8b2c-a180118c4117/62846480607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b1e49c-507c-45fc-a695-b2341fd274f0/66967821310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19dc68f0-1eb0-4adc-b060-1496805e61ac/how_to_set_up_warm_mist_humidifier.pdfIn PDF document text
    • https://53ee2ee6-42da-4c96-954f-60f726bc8d53.filesusr.com/ugd/de2744_ba564b5a62594628bd14f811c8ddc898.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_76b5fb92009c4f4cadb9d6f6ab35f903.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a33ae1-6c47-4cc6-bff1-a48e123aaa0f/what_does_runes_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f71741-bce0-4ecf-8dd4-83fd9e096abb/how_to_read_ducane_furnace_serial_numbers.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_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 5352 bytes
SHA-256: 0d96a26039d96091c84a7db22eee0452b310de211b3decc77475a49f7dc84902
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 10572 bytes
SHA-256: 6602c4d4425be027c4246de21e1e4f8b4160931e935d4bb1de74102c59af4891