Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2507c62889c412f…

MALICIOUS

PDF

91.7 KB Created: 2021-08-10 17:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d9dd30b50fca8dadfed47ae76e1bebcd SHA-1: 10a1b54663e133ec32782a140fb1a10b30963983 SHA-256: f2507c62889c412f44e36691b4f4bae1edc27b6a6c9a80ea0d4b204908a71f37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites, designed to mimic a legitimate download for Adobe Flash Player. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or malware. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://queure.ru/uplcv?utm_term=adobe+flash+player+free+download+for+windows+10+64+bit+firefox PDF link annotation
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaf3bbcc30---60595714188.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/lidaxoxakenutelofum.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161117743a56b4---wufuguridemax.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c78924f1eb31bff4c0a517d215cf6eb3/tutebujokure.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/86304309215.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160886c29c5afe---ludewoguzovitax.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e635f6ff5a---40246485685.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0053d2142b7523e85a0c9921945c6381/89791581400.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/zokagopeve.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/dobozumupomoxirosilakana.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8de531ac9f---77322097034.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/peworaxuzixuvop.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/h2i0oo7gdcjoc2ippsrrat4bv3/pujafegilowumixefoso.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c92e9dd73c1aee0b0d9503b837e51178/77428047866.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/78869817656.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/2622903293.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/16779159059.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/89443592598.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/7fdd90aaba7e701e925b4be334ff79c0/nefowozigorez.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c149dba293---30476221396.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/480180950.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 17444 bytes
SHA-256: 51133cbe37f8187e18504204aff86c8477f12d1de1ef107b76ec06daefcbf6ac
font_01_sfnt_off00012d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0A 11440 bytes
SHA-256: 722577f5a722ad10e9245e33ba0022659da819611a4c155a53c8fb512e1e0d65
font_02_sfnt_off000147fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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