Malicious PDF — malware analysis report

Static analysis result for SHA-256 707b09674c5c209d…

MALICIOUS

PDF

91.1 KB Created: 2021-09-02 03:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b046f9836981db00678557008edf1a1f SHA-1: a389a299913ea3c54f2905bf44675ae0e3000eee SHA-256: 707b09674c5c209decd58f6bb67fab073d06e6f82b218f1be35bddc9f95526fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF containing embedded JavaScript and a large number of external URIs. Several heuristics indicate that this PDF is acting as a link farm, with many links pointing to compromised CMS uploads and disposable hosting. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious intent. The ClamAV detection and ML classifier strongly suggest malicious activity, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://urduhadith.org/survey/userfiles/files/xukazogororejase.pdf In PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e93ab13f792---13536282513.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c571c25b54d---57258704480.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16074902eb7ada---76270272294.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/8442295944.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/31921077444.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/67773902212.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/guzetefez.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/580255e8e49f1be4bfd819d5d0056be0/81970089088.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a5dd2e1d83e2ee06e8f611dc866dbec7/fukedogisazo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097cc4f83447---vufatotabixigidexobi.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd6173be90---57599988911.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/lumexezafalitut.pdfIn PDF document text
    • https://2acontractor.it/images/file/bebisivanutunorebuto.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ad869400e2b85ffa2b31eb99e33960e2/77913851653.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/60552447132.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/waralololelusaposon.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/69382141966.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/sp6u28l3nno4smhqqei520mhl4/96813228722.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075abec53aae---25914438824.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/cb4764c3e8928db2eefacbafd5d26bb7/volukubeguga.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/xobolirokamile.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/92901147807.pdfIn PDF document text
    • https://langumeistras.lt/i/File/kixuxetiwagogosotisijoke.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/zawamudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=from+pdf+to+latex+onlinePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d90df8f9e3fa781b1ec6ccf4e51a5ea5/33085573013.pdfIn PDF document text
    • https://medlineplus.gov/latexallergy.htmlIn 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_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 10572 bytes
SHA-256: 36d568fc620b948bbd55a4f344805b83a7507723dee58275849219ab9237f857
font_02_sfnt_off00012f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F10 18120 bytes
SHA-256: e927c8edeabd2d30e3816a4909642b4826b3b30aab14559342012f2983ebab88

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