Malicious PDF — malware analysis report

Static analysis result for SHA-256 878005d543ed3f22…

MALICIOUS

PDF

80.1 KB Created: 2021-06-30 22:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 893b6341881d59c80f85a5c1e1678179 SHA-1: 323a26f0bd9fc1687a23518c6bc494ef7c9859e8 SHA-256: 878005d543ed3f22c026061e151295501f59f030f351ce7c4a8a8f3316e0c009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and serve further PDF documents. This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/89574080641f4f7a95265a0c2fb8c79b/lixaromomumumonegaja.pdf In PDF document text
    • https://condominiovillage.com/userfiles/file/62280862746.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/298d3c98693787d3414701d3962b412b/57006202311.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6ae7edb41042faaac09b4ab632949e95/59528305990.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4e5489c2c---wipiw.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6b6d5cdec8593f7417d17c4505546ad9/46691693737.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gcc5o4a7182u6nt22a3sd9pmfk/49231073616.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/jizumefumozuvuv.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/mofafewivafawalis.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724fb17a978---vobenovof.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/xinawonikepatexejimumusi.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/29166953424.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/51970356317.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0c30797258fff52509211bbeef6ea378/46067774939.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/wijitazuloxoxowigosav.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/44c983321161028acc53df443462d579/45626981899.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/abf2e331739b651934956b6a9c38a149/gopiwa.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/d3936d5da428e8c22f8bd4e2551c8b88/semowosilakux.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/2a8ebdc3f300daa3e3e609227fc7ed17/denisorivokofozof.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/91a8c91fb3fada505178d0cac81c523c/73474033298.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160738fa4abab1---80999206672.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/jemopikololosirubo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/11c13ae09737e9663a4dae9bfad767b7/noxobe.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/91020747245.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/zovepotikimagakisobivaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=table+of+present+valuePDF link annotation
    • 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_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 16612 bytes
SHA-256: 4df2d1f4fa480994d2f01ab629a70a064a67c7d8bcb91820dd70e1e3fe25d859
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 10528 bytes
SHA-256: 2c7018d588532ba54906ede17c8d211252072ab8c2ec7311ea01d6c8bdf500e4
font_02_sfnt_off00011b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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