Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d0080c6e6d4b22…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 07:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ffce14e3baecc90fe9de45c777731fea SHA-1: 7e310bf778587edab768fd3b4cb7df725f378bb1 SHA-256: 97d0080c6e6d4b22bd403d36c44e83e718a4128fc1f0c16644d654750c532f62
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://smidgel.ru/uplcv?utm_term=john+finnemore+series+9 PDF link annotation
    • http://www.serge-valentin.net/ckfinder/userfiles/files/16101418717.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/gebekemawalarab.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef75ddb137---30359214555.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/83393264637.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d09ccb6cb0---joruxazoparik.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161330e90decf4---kenovosigumamulisatifabuk.pdfIn PDF document text
    • http://oilspecchem.com/files/ladivalujepijiri.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/69797899671.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/8440238463.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/votunisaxakevakeg.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/7679480273.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/muzakiwepeke.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/rofepukon.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314dffe969a---kunulisukugo.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/68000209678.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/kovuzobowotiti.pdfIn PDF document text
    • http://kco.su/userfiles/file/65880346923.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/vofofovewagag.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/sodivixopasotoxekobusa.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///19553448738.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/xunowewinupokekixasegudur.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/16406519303.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/96070540476.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_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 10332 bytes
SHA-256: ff0a029b4730da4ce21f276e83e053cba92ccdf8f10ead0bc49c3293653fab83
font_01_sfnt_off0000f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 17808 bytes
SHA-256: 7eeb5bf05d926dfa4c92816a50e76622d6197649a74087429e93848be722644d

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