Malicious PDF — malware analysis report

Static analysis result for SHA-256 941039dae7a882f3…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 17:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: b9dfc9608390686b3a8fe5e33294d926 SHA-1: ccb1bf87d0f5574883020fc061d1d38ac480eeba SHA-256: 941039dae7a882f3bbe9553efc5880aaada1c49711008bfe7625f78b7fd626f8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution vector. The document contains numerous embedded URIs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to obscure the final malicious destination. The presence of external URIs and link farms strongly suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=manualidades+para+el+dia+de+muertos+para+ni%C3%B1os PDF link annotation
    • http://begemot-rus.com/uploadfiles/file/2021081211175173499.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/rusujojodabamareralonura.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/rovizuri.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3bgcus1o60l8u3ij8cuu0sm1h6/33260072774.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/tutinejofosabenegamuvef.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/zunase.pdfIn PDF document text
    • https://ksuskalology.com/images/file/84598521269.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae267049f31---2554906376.pdfIn PDF document text
    • https://saam.vn/images/content/file/79820861534.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c4388a698e1da76a052552c2646a63d4/toziwivaju.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/lelazodofagowixarujuvew.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/pajidagofajejapadazawad.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/norafupelapixunusuxakuxox.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/38559048426.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b2b3e325---xomamufosevozotari.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a443bc54d8c---tabijemiladelubebawavo.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109011518259261.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/fisaxam.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/219f97e25632aa63d72d7b69b51b4791/44538785581.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/duzop.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/rugumoko.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9cdb62b2---gilobomupajomarusokus.pdfPDF link annotation
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/n7k67g3snte303p58apj6ods9p/sifakavelexuxepurulux.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_off0000d28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 10852 bytes
SHA-256: 2528fcdbf666c6d91632587ec454ed15f0a4c413f2d98afe021f5dbe11d1c0ef
font_02_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 19720 bytes
SHA-256: ed3c8b9d7ba9f7b594298160d02a0a0c0fcf07b6936fee7550cabe3a329f825a

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