Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd682a9fd4e8aed…

MALICIOUS

PDF

74.0 KB Created: 2021-09-03 07:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0417e19df4f2a4dcb6ed8edd1061307b SHA-1: ca63e58ce4028520d8e947b97e5e7b6f2c4d693f SHA-256: 6dd682a9fd4e8aed2b923a8d8d1e661c7e9a331161db955064f021dd24751431
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://irlanc.ru/uplcv?utm_term=nissan+march+2013+manual+pdf PDF link annotation
    • http://alde-pace.org/ckfinder/userfiles/files/konaruzeromusevokemepanos.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/e1a9f8ce569f4453d314875fb8208ff3/jikapikipojumafeju.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/64689634275.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/fmllcl5tpj9gdmhatp4o317822/22846622184.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/66349479429.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/tcai94hbipnr9o7mjt1515kidk/72228686313.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/xodajobokumakoxiput.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/numofimomolijajo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/mtp0ub4vt68ighuba7j2bprf27/10371175488.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607887b43ded4---13958014959.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/ludid.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/79168526343.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/42293433106.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8b753cfd8---jajoje.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/65264138190.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/92c6314e85495a1ed0e5eb5c3f761ae1/88939699707.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/wutamowadiripedusorubano.pdfIn PDF document text
    • https://motiv8workout.com/up/files/talutodil.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c924b3c5581---31781516774.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/22783927035.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/rigawuterezarirur.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/d2514e97909df1360be7535dcdd633f0/77051555869.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1i0aavc4klvhcss8iu09j7fjc7/netipuxesaso.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_off0000bd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD60 11080 bytes
SHA-256: f2fff0b20ed6a7a625c5d5b299536c16d2a5ee62f785371da56071d48b058f42
font_01_sfnt_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 16920 bytes
SHA-256: 69035c0c6d3edb4a8f591cc0fcfa43db495150ef22a92307d7a4f940568437ce
font_02_sfnt_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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