Malicious PDF — malware analysis report

Static analysis result for SHA-256 911b6c27bdac9c06…

MALICIOUS

PDF

83.2 KB Created: 2021-09-14 08:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 70375ae20ba7e823583979a09d94710e SHA-1: b90350dd1445847940d616859623423822639492 SHA-256: 911b6c27bdac9c06d742b3bcb0fe3f3d57032653e4427a8ac944d212e3ef34b0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://archism.ru/uplcv?utm_term=barcode+scanner+iphone+7 PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303eb819594---gejilibejoretiriwege.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/iqcl8gq9p9rftolic3bn7gk6s5/lumezeloz.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/zelenun.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/tibogodi.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/92062630771.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/94007318049.pdfIn PDF document text
    • http://torgoborud.org/images/file/75964999377.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/jebadipemegufasog.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/tekometakejawotabobo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613748fc91e58---94333168605.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/39626188152.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/5786065714.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/27156913550.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/48718596677.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/vuxefepojivofinigade.pdfIn PDF document text
    • https://heyratacademy.ir/file/fedupiliba.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5ba24d4d0c2c0500f92e44079035affd/77666265622.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/99059880754.pdfIn PDF document text
    • http://reopen911.info/media/file/bisawonikibujugesuvuzaji.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/51492793556.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/78339356827.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/22282936923.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/35103d11cf2a2338dafd06d7492dd188/munupovikutekasilarixafex.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/polimaborotewoxam.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/89193180696.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/98709762055.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/duvuranuded.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 10568 bytes
SHA-256: bf82c4a556a9cd24109a3983cec3092e651fb4470b4d69c9273481871e99776c
font_01_sfnt_off0000f804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 17776 bytes
SHA-256: b1bbb916673948f78b5f766ce701f9fda11a173cc1c7d57f999f16720fa3e1eb

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