Malicious PDF — malware analysis report

Static analysis result for SHA-256 01beb59ba966dc27…

MALICIOUS

PDF

79.9 KB Created: 2021-09-21 15:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d2112550f686586c0ae672e9583bd213 SHA-1: f919dbc033bffee12481688053557215d2571f53 SHA-256: 01beb59ba966dc27a81bf0ede592dcf3d4ddece45c8af71e97e24dd552d3bb90
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://pixomot.ru/uplcv?utm_term=balanced+chemical+equation+for+octane PDF link annotation
    • http://unsersohn.ch/images/file/nomilupisaje.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161307748e5911---kokebew.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/bovamujebexusosivozutix.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/febopob.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/fetuzodofotetebudumodut.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/99282224561.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/50634140328.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/xoneturifupofukonupisi.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/komosakezofizezibejir.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16141641faf0dd---35042037926.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/17606635364.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/xuwab.pdfIn PDF document text
    • http://vecsecity.info/editor_up/28151803627.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/34064895566.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/94596566759.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1631899511.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/nejuparuvolote.pdfIn PDF document text
    • http://flexa.cz/docs/file/wisog.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/14380307239.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/nubuwinivigedonumem.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/demizuzezudapov.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/fesiwofetusi.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613da81b34e3a---kixoko.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c25e85bff---museniwi.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d9536398bdda20b0b2f364eaa716a286/bimogujejigebabuzijivef.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/77664824931.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_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 10872 bytes
SHA-256: 719aa45e6c7628bf423b2c65826171a9001145577f1267cc9ca9e041d9c3f5b8
font_01_sfnt_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 17484 bytes
SHA-256: 5949b8434a35032349e68626ce994fe8b7bfca91eaa60d073c6a7ea01a8d0101
font_02_sfnt_off0001196d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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