Malicious PDF — malware analysis report

Static analysis result for SHA-256 1706dd83ec6929eb…

MALICIOUS

PDF

83.6 KB Created: 2021-03-26 04:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0ce37732cbf7c0695067bcee653b743c SHA-1: d2d36be70126d7359b9f87f9b46127aff0a58f7c SHA-256: 1706dd83ec6929eb2904156405ad97782a6839cd3a47632e042727f77500efdb
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to 'Uhaul assessment test answers', indicating a lure. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/wix?keyword=uhaul+assessment+test+answers PDF link annotation
    • https://cdn.sqhk.co/tazakabebilo/C0Ojhha/butevapexesidukorovevon.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/rifapuravizapu_juketep.pdfIn PDF document text
    • https://zijobukevas.weebly.com/uploads/1/3/1/4/131454580/figenizututitojin.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/gh30X2j/tags_that_get_you_more_likes_on_instagram.pdfIn PDF document text
    • http://baby-slings.ru/punuviverikemesoxental9i.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/la_peste_albert_camus_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/4Uxsirr/16628518084.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/jigiZGN/olive_garden_eclub_birthday.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/kejipugaketa-tilel-kotofimoxuv-ravelujem.pdfIn PDF document text
    • http://topsalon.xyz/how_to_use_an_apple_computer_for_dummiesg4vnn.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/zabaladubotu8gydg.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/bericht_schreiben_klasse_6.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/cjaiai8/box_office_records_japan.pdfIn PDF document text
    • http://vehicleinsusa.com/how_do_you_use_a_brim_espresso_machinen0djx.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://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_78f5885094ff4bc78cb49b81641bfd32.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_8231fdb75dba4b91be6e65f1be9b0154.pdf?index=trueIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_f17ca3d8a50d45819f863b229f56d1a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26252634-951c-4eff-a5f8-c84ded9ac260/28528379550.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/canon_pixma_mg3500_series_troubleshooting.pdfIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_9c116d5f83b34d96b28c51d6327aab22.pdf?index=trueIn PDF document text
    • https://e66fc774-3394-4daf-ba4e-06b8397bf223.filesusr.com/ugd/f6d1b9_ba6ba52bf772467faa016a2c0cbfeff0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/224eb924-dfbf-4308-b477-1432f8811318/wironimuwezesivubi.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_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 4732 bytes
SHA-256: 8d7a5d26f2bf70966a384144d6031097a07b7a60cf00e8ac9d4280ca70325975
font_01_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 11488 bytes
SHA-256: 86dc0840efe60e5630fe3b806e459562a819d0385f2f46b2b7011edfa632db54
font_02_sfnt_off000132f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2