Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd26bb94bf4856a5…

MALICIOUS

PDF

97.5 KB Created: 2021-06-28 19:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 084f01df767fbd5a9e7ee4c1c10c91f9 SHA-1: 41f7bd5a8b4fdcbfe9590eee8c333dd8fd6f7db0 SHA-256: bd26bb94bf4856a55af1beaa6b43374b350c01e5a1b007ac62eee692b2d5b560
104 Risk Score

Malware Insights

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

This PDF sample functions as a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload storage, indicating a potential distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://coretry.ru/uplcv?utm_term=wife+being+bred PDF link annotation
    • http://neodentpetrosino.it/userfiles/files/zuluxivigu.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/shtj82q93l58jcil39t529h1gi/tegazedapasajuto.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b01bea204---66469528574.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc92479e45---tabafifakerugokuperipa.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/65916744963.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b7e07c05ff0f1c7ffa37efb3a803e9f6/wivunuwasunemap.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/g8td6ra1t5iidtbq85badcgmm6/galitawugaf.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7f7a070f---vuserudazikewawakenawiz.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/0mbma9iv8sarfho7kuerqsrrad/gekabewufokirajewotug.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9ec97697c---rubaxenowarowez.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/makasibekapajuwudikoxak.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/145a0af6f81c5da9f520a0de6b51e975/simodu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc503c4796---56085341567.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e1ef51afcf6eeeb95a4097b72a215271/mugijerugofaxukefozetafin.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac633eef677---57879427355.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93a096352---20740105067.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cea6c712c7a---95971903964.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d604515028f---rorusudumevivagefo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a076097065f---kufubasomid.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cccdc301cb3---59548902316.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5fceffec---kulelokeloziginepog.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad190e22651---godijamavaka.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935e95796db---3158911466.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/40839080477.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_off00011d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 17320 bytes
SHA-256: 28e93c2c922d323252ab77beea5f46415fd1e73a7d95a096e7ea9305b2c97c7f
font_01_sfnt_off00014a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5E 10068 bytes
SHA-256: 287b89eccf486939b0a964c90cd75be1a32b12ab8baf241d201da914ac472dfd
font_02_sfnt_off000160a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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