Malicious PDF — malware analysis report

Static analysis result for SHA-256 46abc783e97a6503…

MALICIOUS

PDF

88.2 KB Created: 2021-07-14 04:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5826ba3a93fd09e884aeb58e472aca31 SHA-1: 1a438f5837de2c14c508479189f97e0dea19e078 SHA-256: 46abc783e97a6503b7c4a89f26646400aa799bf3eff61e2e5fcd0c9990de68ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://crysiq.ru/uplcv?utm_term=6+year+old+crying PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ct7avdk2anmnb70bilft3pggnm/zijugunapudirelotebusurak.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/vezawujopawodasuzuvas.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74027db9bd---34839035124.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5ec6d69bc---zimaxotejapa.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/ruxoxozawewilu.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9475adbee---jonufeke.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/6ef525e83f35470d0550728ea3f97d64/xuzapetumuwojorelopez.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a020207022a---45226823796.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/2bd1d6934f77d2fad85492d93f1c6416/43882898697.pdfIn PDF document text
    • http://toonesk.com/upload/jefejuwokusuju.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210622224220_plal9h.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8cc5e7b886409debfd52193c692c5bd1/nawixubotojumorij.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/g80udigutcbr9436h922l1kgda/47603407358.pdfIn PDF document text
    • http://rc-modeller.se/images/file///vudukaremiboboxud.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/118c9d09798aea2a67a5982d27c011ac/37992633113.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160e35403544ac---89428259582.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/egp8stns5b6elflr9ma1fal9i2/fapetapipidovuwagobekum.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/729197d82ca37be0710b61ae120f079a/rixipumaginu.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/126996985.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/kusakezipavenapiv.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/jtkho8a59fmoj8a422n5ui4e6m/mupitagiluxeri.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/oom0kma38t39p69eosbv9gia9t/77146529034.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1125a05e8a---50968313282.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4c4e22c42---ribawexavewopelo.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/11348512458.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_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 10464 bytes
SHA-256: 58e83b648123dd4f2267661cb99c5fa44fe24c192ffea1a3197f22edbada9eb5
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 16740 bytes
SHA-256: 1178efdeeb87ea32ec8e1099e66fe6f9a80227a13724da140fd90d1223454081
font_02_sfnt_off00013a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1