Malicious PDF — malware analysis report

Static analysis result for SHA-256 9360eaf9005cdbf3…

MALICIOUS

PDF

81.3 KB Created: 2021-09-23 01:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6e0bd69ec26bc2648956aac44c3a7a42 SHA-1: 6e1837f36e0487f6ed628cb58e9d15db84e0f2b1 SHA-256: 9360eaf9005cdbf3e2f7f6f5a136400607f5799ecd00f92b8c9923c3f434ae97
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such links, and the URL 'https://ketchas.ru/uplcv?utm_term=view+password+of+connected+wifi+android' suggests a lure related to password retrieval, common in phishing campaigns. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=view+password+of+connected+wifi+android PDF link annotation
    • http://lingeriedediva.com/UploadFile/file/2021092222070473499.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/96810594698.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614820134d324---90864467090.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/vitipur.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/kukawisuposexesusifafuwa.pdfIn PDF document text
    • https://premiersuli.hu/files/files/kesilagegiwamut.pdfIn PDF document text
    • http://a899.net/userfiles/file/18199881035.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/lemoxowujenuve.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/65296504454.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210910/file/23122774829.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/meminer.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/7144042135.pdfIn PDF document text
    • https://rcot.org/userfiles/file/32192002484.pdfIn PDF document text
    • http://yuhuimachinery.com/d/files/poxipes.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/34656037548.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/texag.pdfIn PDF document text
    • http://airfa.it/userfiles/file/fubelonav.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/fuzebobevaroda.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/914qrp4q9pp5ih0jui99bimmn6/vixikuvimefalulurenezagos.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/98q89tmfeeq6mvre852asukjua/nibumunakur.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/56182850684.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/78866330375.pdfIn PDF document text
    • https://emenu.hu/editor_up/pufidizegemukix.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/gexod.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_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 17672 bytes
SHA-256: c2fc420cf360513f967fd2dc0e3aee1b704a499f5fd631ffd59121116127dcf7
font_01_sfnt_off0001071b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F32 10624 bytes
SHA-256: 0b4f02c223011eafb38aaae8bdf10de909f44026b2fcadc05c37bc5d25020901

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