Malicious PDF — malware analysis report

Static analysis result for SHA-256 301dddb3bc9bcefa…

MALICIOUS

PDF

78.1 KB Created: 2021-09-10 13:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aac2ebc22d00604651af26a16a3a9e22 SHA-1: f3d0ad926001afbe5322cba08a5edeb0bc1c3cf6 SHA-256: 301dddb3bc9bcefa65ae0cbac5df41470d364ddd65fb3379fa01a18752a149ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=present+simple+songs+worksheets PDF link annotation
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e3db6e3c0---lenijunobojoseda.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/pajoweridilivijo.pdfIn PDF document text
    • http://geotersrl.it/file/bobuwoveri.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/28844215368.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/58001148795.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/21701185850.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132f3fe1eafe---kemalapuromizazenowoxe.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/zodevitadupefiti.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/25047997997.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/33093045632.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/rijuw.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/nubigofovigokexufujitovi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613029f3e21e1---5250949742.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/79772606982.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/40347657789.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e9db1f31b9bf47cbbea0db11da9eeb90/92515632095.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/kugevotozafotimabevomow.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/nenukedazevip.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/jutasa.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/92177994942.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/59606528434.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/92554068095.pdfIn PDF document text
    • http://szjg.hu/images/file/zuvufixiretedet.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/kogaz.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/10737318200.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_off0000ced4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED4 16552 bytes
SHA-256: 937e10119cc953588c19ede62f0eb6ffeed27c37aa3c48221ff28099ff76c45f
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 10716 bytes
SHA-256: e7da0bd7ab6c5ddc43353ce58dd4856808cb1589f68aff3f3e6e78a24fa11b00

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