Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4297c17584ceac…

MALICIOUS

PDF

83.4 KB Created: 2021-07-04 10:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 326f342bac56c9ad08f06da5f4f27746 SHA-1: a6e9275baf42807d1c2c7dd885f9ca17d6e1e296 SHA-256: 1e4297c17584ceac40bc2d0964166700c395e3f4aaf9fedd2e75d08f1d2b1987
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results for broader reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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 http://studionegro.net/userfiles/files/vupilekawulogamasuxix.pdf In PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b85e5d3f6---lupenesepivubikuvokesuxe.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638119c474---33453432073.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/dupomed.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/50855838827.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/7d834e3951e083aa849826d24924273b/6714130180.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/dacc4373e248d206cbfd147d2f6b1bd5/26952844724.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7q8m6s5flj7ircv21jfe23cc7u/vuganitipuge.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/maronabavajavuderog.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/lva06ve29m5rkclf4g1po59n64/zagamodololulisi.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/vuvotaram.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/77325912899.pdfIn PDF document text
    • http://findusafranchise.com/files/files/29126294350.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a1d3f8f308fc85e1a36d17988cce2986/76527900003.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/2fdecbd47585015225f546ac1c0d2805/motonifalosulowebuvemana.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/51657306114.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ko64ct02gcvithnfs4k6se6943/13641229925.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8d1634e52---laxagit.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/ec9b4ce87f225b1400d96a61135ef31c/dazorabeduvep.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfdef5e0bb---xitodagibarew.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210624_ED9EB7C0D87E9694.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/fasrks4cjgnpd31ltobgjut6c5/vofixexalak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+parable+of+dollars+pdf+free+downloadPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27C 2252 bytes
SHA-256: 09addeb75f39ef01c72f38ccb3b1c9f6bff4dbc821359ea601ab83b7620a7d65
font_01_sfnt_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 10596 bytes
SHA-256: 2c1f132821997aaea08e813e205131270cf9603a7b7e68eb39ecb4647b61255b
font_02_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 17132 bytes
SHA-256: 671644249a1e993af84003eca991cc6803d46ebc57db1bf57c42790d996f4a07
font_03_sfnt_off00010fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000127b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d

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