Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2df72df7f2b3554…

MALICIOUS

PDF

85.3 KB Created: 2021-09-11 20:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 24a7115533cc8bc9a1b67fdac56a0f24 SHA-1: c0db9334735972abeeace45b2583aea32876cfb3 SHA-256: a2df72df7f2b355427aab17f490d55e0c287e9bedaafa3bb42b3c454a592c2e9
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. The 'SE_MFA_LURE' and 'SE_PAYMENT_REDIRECT_LURE' heuristics indicate the document is designed to trick users into revealing one-time codes or bank details. The numerous embedded URLs, many hosted on potentially compromised or disposable domains, suggest a phishing or credential harvesting campaign. No scripts were extracted, but the PDF structure itself is used to host these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://badaranquehablar.com/userfiles/files/72615774521.pdf In PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/limukitikagagu.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/24348284164.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///wobagukiloso.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/fedunufetebamowefudu.pdfIn PDF document text
    • http://greenglobepms.com/uploads/71271192084.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/vefiko.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/xokasabarabiz.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/8718741949.pdfIn PDF document text
    • https://htijsr.com/userfiles/file/37294637447.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fd67ec7c4698c0ed7fbf8de0e960e032/woxasunovapexow.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/42184814984.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/95035158055.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/8361819898.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613994aad692c---nasugevobetapedide.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6e5f54101bfc4c437a14fc9cdbb2488d/91227698619.pdfIn PDF document text
    • http://podushka.by/files/files/15166282503.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/34357666188.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/75810077830.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/319261281.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/bixanakosuxekefas.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/papedutubekidez.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136d3f057f0b---tabafipatodotibudemeduzo.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/fibidiguxinedodafaxikaz.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbf5765e88---vidomijizexalofakabaxurun.pdfIn PDF document text
    • http://mutitar.com/user_img/files/17799884896.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/33611979997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+transfer+contacts+from+broken+iphone+to+androidPDF 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_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 11148 bytes
SHA-256: 7b970bd739d59e90f792f13d694546fe84651de04b55a41888cc5b108379eade
font_02_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 18016 bytes
SHA-256: 408a4f1d9c52eb3a161bad96fd05b68a6f622e1d51696564f84a29ae78922a9e

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