Malicious PDF — malware analysis report

Static analysis result for SHA-256 0649cad8dbc89d44…

MALICIOUS

PDF

143.4 KB Created: 2021-08-21 07:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6c14546bc1e4e478f9e6edc6cf0bc0f2 SHA-1: 93525da94155286c1a007dffbcd8fabecfc5f88d SHA-256: 0649cad8dbc89d44adc69e174edbe26cdc902df6380115ee768cd157b81e1901
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=anatomia+de+los+animales+domesticos+robert+getty+tomo+1+pdf PDF link annotation
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e670137ae8---takipiwezobabanuga.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ada83bdd565---7683557570.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/gifogalolenegabe.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/68509847451.pdfIn PDF document text
    • http://ymmicro.com/files/files/24687644289.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/xifawadokinawamakupijekig.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3dd322e2---99155459976.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/45904686487.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/xuperorinowebinoki.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/30836f300963aff370146bfd487ba309/dobesag.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/03c912da418360b17c15db444fe93c90/sokipojapesiworogus.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/xoxosakujikoz.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/0d7723d6988b775ef238e2b1ea584248/fazugadikojufoba.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607063b0dd57d---vozovaworotifu.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/79713072343.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/aea44c8b7a70da3c2bf388af8e0dc503/depomidopesupazu.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/refunulilemejijupavu.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722292d0574---19854385288.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afea0d559ee---76115116635.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/686f0c15ee569321d3b80a7dd985690b/30013360462.pdfIn PDF document text
    • http://4bx.pl/public/file/34753143147.pdfIn PDF document text
    • https://majubesar.info/contents//files/neweroxavejemawujita.pdfIn PDF document text
    • http://stevis.cz/files/file/84666596822.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/748358883004fb4bdf32879786cc0f50/65005485116.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/df52c289bbdc8e0987a8d08fa69dcbfb/litenaluneve.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_off0001c63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C63C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE4E 20540 bytes
SHA-256: d86ae35ee13e7fc2bfaa17587fd481560ca47d5ff0a6ca5141f4da6ec9567d58
font_02_sfnt_off0002126d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2126D 11248 bytes
SHA-256: ba8fdbb8ea8111bb9d787885351244f1a5da7af3056db2fb1a30008a830a575c

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