Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffae7215e20e3e1…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 20:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b14c2241df0b72d5c9977a8c81b82f7c SHA-1: 120715d5a0f2b9b35dd94e331b8476fe5f1ff744 SHA-256: 2ffae7215e20e3e184e937b1e32140f580eb681516bd79f4f1a3fbf3642864a0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm and a social engineering attack. The 'SE_CLICKFIX' heuristic specifically points to instructions that trick users into running commands, likely to download and execute a secondary payload. The embedded URLs suggest a phishing or scam lure, aiming to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://inwebjor.ru/uplcv?utm_term=how+to+make+your+laptop+into+a+second+monitor PDF link annotation
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f65cef28c6---42005355725.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/43743147691.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f02a7a126f---xebesine.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/klchg6nidl6dgb4dsfcj5g4991/7930128458.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8e98458bb---16041977739.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/razebepiduxebukap.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ea586a3bb---dikapikamotowemi.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/pegaxuzudozisexiveligaw.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c2e866c2---bowevile.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609526c64c650---penomofun.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/38a5456be112c282fceea4149f6b9b56/wapubixepuket.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ba45f65d2742638f4f8ec8a37bc00d0/pubebifi.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160863867623b5---mijopelaka.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160879b0d4df23---53313765288.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070b874e1631---94064204006.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab96dae4ab---55843505802.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/82229678693.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/46037404269.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/parabunovosaronex.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/72gqt38m5p880ccn04lqg4s2ae/12810979495.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7hd40797nipc0bu5llukl8i7p6/50183681786.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/levuzutazeputasubuk.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/d4g4hp4teb4pdrenjb5hlc4g7v/58530220239.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/btnb69oimdni0rrhs08367sfmd/70887366829.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 11060 bytes
SHA-256: b9693fcaef5e207c5611458f6efccb608081482da91bcbea0d824cc18f9ffa0f
font_01_sfnt_off00010a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 17128 bytes
SHA-256: 72add398df0be53de8e3235a5c0e20c2b1206a50c02b4fb2c4c41ed22fef1c5f

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