Malicious PDF — malware analysis report

Static analysis result for SHA-256 0130a2c7ac9fed30…

MALICIOUS

PDF

74.4 KB Created: 2021-09-05 09:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc38afa6d44f4ff1d672c08c272e2503 SHA-1: da623bae0bf66c315d62c9891f8e4ad1f644e676 SHA-256: 0130a2c7ac9fed309db95b4dff5c29a35c5573ce2beb02488f69ecd1174ebe45
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URIs point to compromised WordPress sites and IP addresses, suggesting a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns are indicative of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=wildlife+conservation+in+ethiopia+pdf PDF link annotation
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75eb4cd715---20901962268.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/91a42aa01bf9d4e80449142d7303f3b2/pedovidajikubewejasogex.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/nodatufotedub.pdfIn PDF document text
    • http://rayer.cn/d/files/josorebediwemubutivejedam.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2cc01aa8---bowazubizugaxitojebofuf.pdfPDF link annotation
    • http://asfalon.com/__files/file/93504806550.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/nebomalugi.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c535d43c1dd---mawepura.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f81ff4ae648ee05d0fa29de1b7cf25e8/molosu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160943b1d20bbb---zavovegugeligaxage.pdfIn PDF document text
    • http://tungqibiotech.com/upfiles/editor/files/60673665784.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/toromazenigoboxerewila.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2a41e55ddcfbd13fc27d5dbbe6bf3e38/fajisijedevonol.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161111a3081ee0---46932249821.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/34206913888.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ckq8cj8nv6v2qnne1b1blfhfpt/20902189846.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf10a4289---diwobogotiz.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/92719406997.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4af8a00726---ralikamogegazesevanugubo.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/bitetalituro.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/a5d55178499a6102f0711c80561ea4d1/87148606857.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/73809573792.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/pularegopigu.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/um8i4r4a70h0m25o9orefb2bb3/62211402039.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/gepuwujivodawabofakibelo.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/midadesesum.pdfIn PDF document text
    • http://www.520amis.com/upload/files/49854908949.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_off0000c27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27B 15880 bytes
SHA-256: bfc5a2e26c78ce424f3081e358be84426096b2dea0b2942c7443cadebac54b9d
font_01_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10337 10776 bytes
SHA-256: 567d3bca3b816bca3a727ff14ef7132e5289ab4f1de205adbafe79e99927e9fb

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