Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3d65a01b29e568…

MALICIOUS

PDF

89.1 KB Created: 2021-09-20 03:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2f621a59945f08500cd359678d271c5 SHA-1: 9ef7cfcbfe3fa01dd7c2349286f1c188969b329a SHA-256: df3d65a01b29e568a7f5052137b72f901ff4085ae32597b7da3db09836c162df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=watch+call+of+the+wild+movie+online+free PDF link annotation
    • http://sonnenheizung.ch/fckeditor/editor/images/file/buturirimoke.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161410db40d397---67276998333.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feb941c45a---69579024653.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/laxozitovigo.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/44112770773.pdfIn PDF document text
    • http://seritour.com/rsm/files/gibabafugivofofexi.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/gafofanaxikozosan.pdfIn PDF document text
    • https://terracell.info/images/file/nizexelozivagolofopijuvev.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/12621647642.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/80914567036.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/76649639441.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/57297945664.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/goromazelaretogokijo.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/kujuruz.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/fufabadamana.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/29377056971.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/33527934558.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa85b56842---43801995767.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-20/20210920020339820074.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/75797701384.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/ligix.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb9023869---pikete.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/mozewe.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/92983604621.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/gapokofonanebupig.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/dukuxosanigop.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_off0000f8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C2 10720 bytes
SHA-256: 4d10ac9840a3d2dd04d224dd5c8a50506ba340bbcfd6ed8e9e736a45934ab0b6
font_01_sfnt_off0001113a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 17596 bytes
SHA-256: 0accfb6d8b937ee5ab7aa1e7aa0245b1b55d1c335cfdfbc63b634c1c90722478
font_02_sfnt_off00013e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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