Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d296622d81e307…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 21:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1dc49d78b85ae59fd74602c132dc15e1 SHA-1: 4602c2b6a3cf7285d0dc6eb8767d35d257784ebb SHA-256: e2d296622d81e30772eb2d2627dd74362e65bf3672be276b9a1f82f5c736b3fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://alihuata.com/userfiles/file/zakolelasagureme.pdf In PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/34b89ba3063e9b94ee7c299eb95a8687/99459072117.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/b83e0cbaed60b391f59c075ac1421d6c/2151572031.pdfIn PDF document text
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/webeja.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea7c534fc3---95618043307.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7dfee5644007fb84311a9da2eadef283/83006023050.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/labirolu.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b15e57c09e5---xodolimonisizevufonagu.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/begamatolejinarem.pdfIn PDF document text
    • http://klefmarken.se/upload/file/8944503384.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094956d44570---wovisomivavukimalijoxapof.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/65e44h82n0ld52q4btgi4evto2/fabedomezulavekona.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/duxulogosewojufibidiw.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08f216e351---jasezo.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/81e156d177c1f204390606f31ef00fce/texogum.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/1cvg5rap905ogt9h104vvrhqh3/wolupigigifozexuzisunap.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/26eb107d4baf6687a33888084cfc30d9/59297613437.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776e56adaff---95323196502.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/vejitomedanidunorugetewu.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/plq9966rv8blo1o9cot66bmri2/falinevikesufoziv.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/berorimopefirakuronutumil.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2f1e39af---vopinubu.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210521214257992266ckkmj8.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=burns+questions+and+answers+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10762 17464 bytes
SHA-256: 75d80d0bbe9c0172310d0b810632034beb72043bad55163d6dab61032fc19e2f
font_02_sfnt_off00013538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13538 10828 bytes
SHA-256: 06acd093ae2fc86f273ca0b3667a6dc36abc14069cabe67dfb6f554832ebd437

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