Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ab5f18b08bca8b…

MALICIOUS

PDF

79.3 KB Created: 2021-07-19 03:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9166b0e7110537670bfb1e95c7738a46 SHA-1: a3e7df7eeaebc073c24970361c90e605d5aa22da SHA-256: 59ab5f18b08bca8bea1e81d1fe221dd25772684ef28154ad277629f123233883
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable domains, suggesting an attempt to obscure the final destination or distribute payloads. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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://minervatech.work/js/ckfinder/userfiles/files/nejafekazugakitif.pdf In PDF document text
    • http://strap.sk/uploads/files/pukop.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/talekomijewakedup.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d88766d1e1d---lorukevedegovelagev.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1d35f80d8bcf0f9ab361c5424ad1db45/41627552441.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b94f1b2158---73876593377.pdfIn PDF document text
    • https://europartner2.pl/uploads/menubifipagalewuka.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/vadujejaw.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e01fc9db7074589e015112b5feaefa54/42544730710.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/4e0de8598ee1fecafbae0fd421b1b93e/damone.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/nezexagozonujimofigabov.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/59912298720.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/32594123044.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/89985683717.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c084d575b---fexigofuvevogakuxugodufu.pdfIn PDF document text
    • https://asi-filter.pl/files/file/mekuvokaxunezazejapo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/48d1a68217bbe1a65fa9b4335fb5c997/vaniputotudutodolifinaj.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/39099533716.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160f4c05bdb59f---27910659167.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/05ed1d34faf8992a07a3b9134e119162/79540375504.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0824e6dd3c---90525713818.pdfIn PDF document text
    • http://fundraisingwebsites.com/clients/9/96/963d931f30a9d2280975e71a7f923c96/File/57126212601.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/boputexedonuzoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pictures+of+people+from+harry+potterPDF link annotation
    • 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_off0000d2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F4 10856 bytes
SHA-256: 850feafa98938df910947edd07e7391d18b75279ff7c25fb4e32baa87153c796
font_01_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 16872 bytes
SHA-256: 9d79f654ece8a30b77777b1235d72a91a9ce22d8b4222f7e410949716664941d
font_02_sfnt_off000117dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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