Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3ba1a10ad1234d…

MALICIOUS

PDF

86.0 KB Created: 2021-07-21 02:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: afde4b2886c2cc2f84404fb9ef65c4b1 SHA-1: eeed40f4f4a13bfbd84991ff2327722dddb11d78 SHA-256: 6f3ba1a10ad1234d734d6ad6bfbe8fa001c56deab94b3f96950e57ba7a9a1e82
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7o5bfsome5kbfepsiuntn8at61/powaruvug.pdf In PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/94ee4groqqvr1buovbhmi54jg7/75243082529.pdfIn PDF document text
    • https://clubon.top/uploads/files/mewilidazovikujasutapa.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/95641843097.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///sogoparurub.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/q8de3t8b7mcopk12rco4ti1t0f/lofinarasikofo.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/bezosozilib.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/kifisutudoravetoxarumuk.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/mixadilutotogibog.pdfIn PDF document text
    • http://peak-experience-japan.com/66058361672.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-27/20210627050752609142.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086acffabc3e---kidurukixinusamigani.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e7eb51bc5---pevamamogevukubuxarowo.pdfIn PDF document text
    • http://landpas.pl/upload/file/nuxetela.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/v7ftnbgvsqfosh106vptqrsok8/680736166.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/wapiwajaximaguwiv.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/v81dkgmttcmljm6nea19pqoga2/52936658523.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/87167449386.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/bulolifer.pdfIn PDF document text
    • http://naviway.su/upload/files/letaxutavuwatodolixoxorel.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a640436b6a3---27123172049.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/is4adhvt9o3raic2i07likd4kf/84302642009.pdfIn PDF document text
    • http://webbuilders.com/files/file/gibatasaseg.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fn98js5tergug1n6gpcplcgijm/ninebamesexixelabijowuke.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/q9mnku4u3h4k72ag1p88oia8vh/gadezasalaxagoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=i+think+you+love+me+nowPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 17496 bytes
SHA-256: 85ba9daddb69a98a7adcb3fed8872080a09b2ea337d9ee98db8775fdad027f0d
font_01_sfnt_off00011b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B44 10352 bytes
SHA-256: 8371bd26a6ddda3597e81977308bdd25e490da22c62fc6d86bfd675c936b71c3
font_02_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1