Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d20acecf34e23f…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 11:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 05a90ca8bf6fc9c77585f423d1932416 SHA-1: 5af7ef34287a6d8903e4bea9519c6dfd72c6411c SHA-256: e7d20acecf34e23f477591f521dc176f737dcc35f859b0facf0bab9222beb846
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs and the nature of the heuristics point towards an attempt to lure users to download further malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://queure.ru/uplcv?utm_term=vax+dual+power+pet+advance+user+manual PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7b8f96768d---218529407.pdfPDF link annotation
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084f046ee389---sinaseduliloxuwaligam.pdfIn PDF document text
    • https://kermanrooz.com/img/files/dobawatabi.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/zobawudujedutefiloromuda.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/lubugolasiber.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a237ecacb8fe5a524e6001d0edb8f6d7/xulix.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/mirik.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/tedasatelalusupipilon.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/41948349346.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/lpr55f53ea0hbf83riibrkahc4/molawosuwop.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/27935931748.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210516/file/tirum.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac16f779a6d---toranodefez.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20425ea11---filexijuvob.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/77818662779.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b34c92948ae---duroworepesezesajun.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/69cb6fca391bf10b42897f65e770417f/vevaxamog.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620618589.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/lalap.pdfIn PDF document text
    • http://lucann.com/Upload/file/zofomugilivaritupukawolu.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/k69nhvg6804h0puksnn841sisc/78195719287.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/rorepibej.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_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 17612 bytes
SHA-256: ddc80082b1733eb020a363ea5b4d9349a9f9fb2883e0f4536dbf225972c76471
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 10904 bytes
SHA-256: 3ee0bc929858af52c014cc0a4a59747aa865f072ccb668c97776f12542b6367e
font_02_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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