Malicious PDF — malware analysis report

Static analysis result for SHA-256 addc7144b69e4ae8…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 20:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5c1e6ecd6e748c780ab88e9216da76c8 SHA-1: a7d57b77132031404d8d293144ed5825fc684fbc SHA-256: addc7144b69e4ae890a9c2ca91b1d663bd00b65678dd27500c42753dc400109f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites and disposable domains, likely intended to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern that leverages external resources to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://medvor.ru/uplcv?utm_term=the+hobbit+2+streaming+eng PDF link annotation
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd25c9fed124289660a26fbb32cb15e7/bufiwilolala.pdfIn PDF document text
    • http://jkohut.pl/file/31754167131.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/lopikepugelupowekilujabov.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/97a6b5bc6b42431689395294bdc07149/saxexivasemidimod.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/qo6fhvn92ei6p2b6m0gd7no7tf/melawarubilikisu.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc6141beec---gofedevenebodode.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/84035366017.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3667f67b3ed35c07be264f7566ff788c/81383997445.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/dozurogazesasetizo.pdfIn PDF document text
    • https://sanidom.pl/img/file/xudetilamanumad.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7c9686dae---40957144481.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f9d6c8d83468a30ed47691ab8c72f7e4/2419276845.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7c0d23d11149defd10e2b08f2c632041/69600276542.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911e8b8b41d---kujogaxogugil.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/p02nopp7kqrb0dltubvpkfoqnf/kujilojut.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/5cc70c557cb403473f97aa2409c56619/popodaxetem.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45589043613.pdfIn PDF document text
    • https://eternalbliss.net/file/12086951919.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/55eb0481a84d1c8de70729dc724604f3/gedidobonawamevozoto.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/44810415601.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/bdnm557epaso55n3aih4v3faqs/45385603940.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/13677305786.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/37314795300.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/46fbe6e8ab2fec63dc2cbb4870eed508/bugitolotawudalezosabolo.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f55c543905---56101619287.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/06/202106290328007438.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_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 10732 bytes
SHA-256: 6f97bbbdbd134dfc71ab0163d90a04e4f4686e7e80c927cc580ca5382a98b754
font_01_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 29380 bytes
SHA-256: 57771d87b54cd655e26aa5c5a5210311ee20d875a170c92c1a9d3346d9ba912e
font_02_sfnt_off0001459e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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