Malicious PDF — malware analysis report

Static analysis result for SHA-256 846429d1a44206a3…

MALICIOUS

PDF

73.5 KB Created: 2021-09-05 04:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ddbf1a26c0ed37fa06def73cee91ab6 SHA-1: 0c199d8f1906086db4392c70d74dc155db6ce50b SHA-256: 846429d1a44206a363846de1bc8d7a45b11c6ac798e3a1396852cac3df9a64d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate it likely attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ketchas.ru/uplcv?utm_term=present+perfect+for+since+already+yet+exercises+pdf PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59486b8d24---kizeso.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/a0032a2f4f4d1a8075a9760b1fd6a26a/92930254946.pdfIn PDF document text
    • http://temple.mo/userfiles/file/132419147.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/v9qtpiqj90v284i523lkhlfi5a/96971521034.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f6f99591f2f600cdcb7a6a34c8da6dd4/1152118697.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/44af323be3b74ca2ebb6aa30de784cf6/56832473234.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/64412649179.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b46b24ee63---lopike.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d6d1ad06bed56c4ca19bcb70a96ab832/fuvasamosusipiruzikusoj.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c815686b2---fatagumitabisipus.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/95050181334.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dab91aa8dd---98430335810.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24b743ce40---36044364869.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/bejewux.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dfb942871a8c0bec93a0af7334be95a/16707405055.pdfIn PDF document text
    • http://orem.mn/uploads/files/14211678936.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/kijelulafozabidogudo.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/15980917852.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/rufitevatifetimos.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b63931287---nifofib.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/29024594582.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/15538257070.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ec85bca2---mitojisula.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892974b366e---lufarobajuwoxenoguxowino.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_off0000ba09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA09 10832 bytes
SHA-256: 53bbcef88f676248bba0d66919ee03eefd0e0d4a7699ad75c79d005727432755
font_01_sfnt_off0000d331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 17492 bytes
SHA-256: ae5bc80e3f69c44e5f396266ff8761a1566b290a44d8deb2ba9396917b4982ff

Open this report in the interactive analyzer, or submit your own file for analysis.