Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da3544d7c036f8…

MALICIOUS

PDF

67.4 KB Created: 2021-04-02 05:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f5d52bbe28c8fb9710aff8bcc5a1124d SHA-1: ea6e4f1ffb6265c33ecb8f4a6ef4199e5392b469 SHA-256: 86da3544d7c036f8918e3e3a6be17b6d7f564823bb252e120cf0444f2689582b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'business process outsourcing'.

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://zajinet.ru/award?keyword=business+process+outsourcing+the+competitive+advantage+pdf PDF link annotation
    • http://ritual-venki.online/kepinekejimeftxbm.pdfIn PDF document text
    • http://cocobeautybar.ca/baldwin_acrosonic_piano_serial_number_information5tyfn.pdfIn PDF document text
    • http://cleaner360.shop/rewalodz74w.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/12279141070.pdfIn PDF document text
    • http://gnfcns.info/what_is_software_version_controlny0hc.pdfIn PDF document text
    • http://baranaydin.org/vanurifupozoladx8aet.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/62525246508.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/dekonew.pdfIn PDF document text
    • http://jitufar.22web.org/ejercicios_adverbios_de_cantidad_en_ingles.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/90404c83-20b2-4cf9-bdbe-ea57b9573cec/vozasa.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_ec45769caf5b46e6849e61ca3bb33f15.pdf?index=trueIn PDF document text
    • http://jelomasulavi.atwebpages.com/fated_alyson_noel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8aadb2-2985-47f5-9386-e0da29dd5546/44399143625.pdfIn PDF document text
    • http://wosamufudov.epizy.com/kufizulibetibenixaroraxa.pdfIn PDF document text
    • http://dajodenojekox.epizy.com/english_grammar_full_version_book.pdfIn PDF document text
    • https://73808e0e-d5df-4584-b63e-1552d949bc0c.filesusr.com/ugd/8d2ea6_1206cc840dfd4c0685f4645e60bb79ba.pdf?index=trueIn PDF document text
    • http://pagilupoge.rf.gd/21939074054.pdfIn PDF document text
    • http://salogun.rf.gd/atwood_hydroflame_furnace_wiring_diagram.pdfIn PDF document text
    • http://xipijokezi.rf.gd/49124226223.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_e636ecf3d07244cb8f7a2e2a7b63a28e.pdf?index=trueIn PDF document text
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_d802fb5292954c8ebac85778e3c31bbf.pdf?index=trueIn PDF document text
    • http://tasefabomodewiv.epizy.com/xavanopinafidor.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_off0000c990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC990 5644 bytes
SHA-256: 2c09195b68bce75069886bbac2b015f3da89c9489f98557fef7d6e929e18aca9
font_01_sfnt_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 10252 bytes
SHA-256: ead4f35a5164e541725c8d57de506e264bb529ac5cfc8136233acd2b2e4589a2

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