Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a97fe540fd9f9b…

MALICIOUS

PDF

90.7 KB Created: 2021-03-16 23:25:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2e9efce59c8836a4aceca561310bc622 SHA-1: 53ae5e252ae8dec6f1af36a4a4893fa6e647e72a SHA-256: 93a97fe540fd9f9bd0cc48f5eb3bf7b936a6b5954e4dba08918729dda21ae111
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML model, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://vilenefex.ru/award?keyword=divina+commedia+purgatorio+canto+1+pdf, is likely part of this scheme to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://vilenefex.ru/award?keyword=divina+commedia+purgatorio+canto+1+pdf PDF link annotation
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/28558e1eb526b62.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/mofasewudebejuwez.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/kanorakunibafad.pdfIn PDF document text
    • https://xelixexojiga.weebly.com/uploads/1/3/4/1/134108676/sawuraren.pdfIn PDF document text
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/rotesibubuxibonofom.pdfIn PDF document text
    • http://shmelev.pro/litafenizafukodikuztb50s.pdfIn PDF document text
    • http://zoosalon.org/faronozazuvpb667.pdfIn PDF document text
    • http://casser.xyz/911260930345h41f.pdfIn PDF document text
    • http://axecheat7.xyz/pivotegikadapaxovogalq4zf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_5f0397345ec0451d8bf30b6e85d73eda.pdf?index=trueIn PDF document text
    • http://ditiruvovuluka.epizy.com/36307548546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab14b4bb-f9be-46a4-947c-4c6fde24480d/do_all_portable_air_conditioners_have_dehumidifiers.pdfIn PDF document text
    • http://wupubobetob.epizy.com/python_tutorial_for_beginners_free.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_298732269d2547b4a54c36c7ecef43ff.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_4eabb91b5c204ed498169904f8261097.pdf?index=trueIn PDF document text
    • http://magajavopisili.epizy.com/dunakasugebujuzonozol.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_4284274cef5a4dddb235f9a5102bdcca.pdf?index=trueIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_6ca8a6c599f840d8a862c0f53125187c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01d1314-0353-44bf-ae24-97e18c9d7e60/how_to_track_sim_location_in_india.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_0abd243854454b71b2eed7f1a8be0063.pdf?index=trueIn PDF document text
    • http://gedokap.rf.gd/genesoxoxenufejixofimitu.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_703588b26b234baab480e24ceeff126a.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_7c8eecd1a1cf4e3bb912314b19309f2a.pdf?index=trueIn PDF document text
    • http://lotawovuvowuk.rf.gd/barbour_womens_coat_size_guide.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_323d9e1534e648aeaa5531a527bac4d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06670d9-b15b-47e9-8d42-650050b20e90/kikofabuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82334a0-5515-49a9-882d-8496e02f0543/hp_photosmart_plus_b210_printhead_problem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 5256 bytes
SHA-256: fe4bd055fc5af93e217f700a9605ea6e2e3d617963ffb68410223ddf6685444d
font_01_sfnt_off0001281b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281B 11744 bytes
SHA-256: f30e16d22022483f5520f0ed3a3dec61d98a2ca054c5249ec5d5ae13413fd470
font_02_sfnt_off00014e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E44 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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