Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48d9a68b551939d…

MALICIOUS

PDF

79.7 KB Created: 2021-09-02 06:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 10e896b13aae3ae30711e9ac6e5c4952 SHA-1: 802a081e2a350fa4f2d3ce898eca0daf74868674 SHA-256: d48d9a68b551939d8265e70748ecb56897bb11bb913213d1579c6bcb35233845
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous links to compromised WordPress sites suggests it is designed to redirect users to malicious content or facilitate further infection. The link farm structure, particularly pointing to formcraft plugin uploads, is a common tactic for distributing malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=pee+all+the+time PDF link annotation
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853ce811dfc---webifibidagipipimedo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/cf2a597964fad28fda84ebfe9317408a/vaposuvuzitixe.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cda8a5d1c30---3892486119.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210807174956.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/19364178fae6d765cdde266ab57795be/gejoxanuzixutexuletixar.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1629570584.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98ea01a36---pedebizomugipasetukoru.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/63685777364.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kemojililuxekorudoxo.pdfIn PDF document text
    • http://519pf.com/userfiles/files/murigizixov.pdfIn PDF document text
    • http://princeverma.in/uploads/files/69526205981.pdfIn PDF document text
    • https://cargobull.cz/res/file/kojivap.pdfIn PDF document text
    • http://berbun.com/user_img/file/31613268217.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/30323f9829e262aa973e996e406c7894/11604069719.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782cc60e175---56891708156.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/ce75c2f6b6adb64aa1ac3e74a28e642d/61448261423.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/serunata.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e343c98309---45858531134.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8efed090d0---jevutiwezatemoreguxe.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/fuxapiwawanotugukaloj.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/lononisusoxulezikogeko.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hs8am1sloovsu5a200vooe0uq7/6868722140.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 17716 bytes
SHA-256: eb69dabf924f3170ebe1ca5eaa4103cb4838d66d02f897f30dcee8a47324de75
font_02_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 9884 bytes
SHA-256: d5cdc82d00b2d8617c4a0197b4212395be6f13de344858990cf06a5dac1248f4

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