Malicious PDF — malware analysis report

Static analysis result for SHA-256 3094e411933a8f0c…

MALICIOUS

PDF

98.0 KB Created: 2021-07-03 06:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0a4b309faff31c642b2e629e48817dd5 SHA-1: 464a8e9ae838fb11f2f75f7d882eac5549e506c3 SHA-256: 3094e411933a8f0c499637b58b5c8c25212ff68072442ef465871cee12dd0c4e
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of external URIs and link farms suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/uplcv?utm_term=texts+to+make+him+horny PDF link annotation
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/kunasobuduzigusef.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfc4049308---kilosoz.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/6346228649.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d04f1f3ddcb---liwup.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd39c09003---bironuvuxuronazavovoramo.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a932e7c216---vosatiwelaberaloxazefugux.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/mijopixerelobewitox.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/29169331641.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/e3ea61db9061a16a0a78af478fb23ca9/xenuzapatabapexiju.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210513025722978.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1fca0310bf4207ef81996b7977912dad/10381936603.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/gomenizigusobepeketojam.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/wanofetoda.pdfIn PDF document text
    • http://4bx.pl/public/file/tugozodi.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160965e396b72e---5829818340.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/76860770817.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/mitomapi.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8c6a533f---38974100530.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/maxojij.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/bezikazawerofuligowuginog.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/878661ea7edc387b1cb5c5872cde5126/49835478179.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/navobiwewewaxovugu.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/72707293414.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 10600 bytes
SHA-256: 287816e8be651227889b9b733e47a45d3e430f80885ee9eb31761fd100f3251b
font_01_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13560 16968 bytes
SHA-256: c83acad5789332a27acb9a982e582b50d117e4bd6d98adf575a71231252c1c21
font_03_sfnt_off00014c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C78 17276 bytes
SHA-256: 80d3e7756a335b0b21b9909a236cc471ee2ca347eb64dc6cd5c98c7259dfdcd0

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