Malicious PDF — malware analysis report

Static analysis result for SHA-256 777a94f905cfa9c8…

MALICIOUS

PDF

81.5 KB Created: 2021-08-21 09:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5cea60b1d4b827fba490722f5ae45dcb SHA-1: c14650f89607d7d0d072cb945ae6f70a9d381787 SHA-256: 777a94f905cfa9c8ac7e5d2e8eb06c78445b5c8b5350893f4f06075409aaa5e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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.
  • 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://cravaluos.com/ckfinder/userfiles/files/24414592847.pdf In PDF document text
    • http://tbff-bygg.se/img/files/pepalokukuvuzasamo.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/moxinim.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/jutuselupif.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/54403538148.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098336ecd30d---bowerexibosasarix.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6b1e2d7407e671393120505a42e5cb71/wotowudo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/161056714d7326---xeposatu.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/wedatunonawezexunukuxu.pdfIn PDF document text
    • http://plncse.hu/php_data/file/noxuxemogiverufafirazejof.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/54644016747.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/3910d24cf645dd19bd6aea9e1d1068d6/fatasuzol.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c1c4e6843---10437444633.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/wuzenetode.pdfIn PDF document text
    • http://novichiha.ru/pic/file/77449128345.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/naxojimutopijimedotiw.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160768ae7e5f4c---rosuwakapamo.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/8bqbil3putl7kfl4brn6auo2kg/vakizovijejopuvonetu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b197002272---sagefisoxupofipapes.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/jenatin.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/35623941189.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f7c3d5526---xokavotoxoxuvo.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/36670709536.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757c8ea7415---8987908156.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/jebij.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16081881652e4d---82603731707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=why+is+my+left+jabra+earbud+not+workingPDF 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_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 11456 bytes
SHA-256: 17a03b96c9307c3cc0f5ab6cad656285d8c2a7ed8b33fdfe1ca4a9d4cef6c798
font_01_sfnt_off0000f544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF544 16612 bytes
SHA-256: 14fbfd8e3b105d38d9b0c3cdbeae29da63c6bd77cf0907861468c18051f4fff2
font_02_sfnt_off00012068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.