Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a97267ed1d96207…

MALICIOUS

PDF

99.7 KB Created: 2021-07-23 03:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d42293f9cf966e02c1c9e9c8fcccbc3a SHA-1: 209c60de3ba00185248c3cc83b79919b6d3563eb SHA-256: 2a97267ed1d96207f4348b627d817c97b9d5df6bece1a76dd186a3b701f1e317
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised websites hosting other PDF files. These linked PDFs are likely part of a phishing or malware distribution chain, aiming to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f9fb1d38af9bb8d23982d4ada0d584e0/rukamuzufodejedi.pdf In PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a8b47519b1f1646cc035921063b10d0d/22294688242.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c43e61b591c---22666533046.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160852382c4272---mikotapatobozuserirafefa.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073b169835b6---gejagutimokawaxokuworun.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/20837842976.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/11326692362.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/82659929920.pdfIn PDF document text
    • https://actorconseil.com/files/file/91493005173.pdfIn PDF document text
    • http://aimic.com/userfiles/file/retezeda.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3b346c037ae8cccc7c2ad53a029302b3/24515262302.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/sazojosudafunotexamezus.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/55319108906.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94ed027e9e---zipajowakakorabopad.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609885c7d8c33---81010122658.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608de0f18437f---jofoduromuruwok.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/36883205342.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/0fb103dabaafaff454d678a00406ff1e/60368035341.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/73869736770.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/zupolubapemekeguduf.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608d344f75fa7---97239487234.pdfIn PDF document text
    • https://ghnservizi.com/file/gufikeg.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nihupsud6gkqg88e9dpgi7dk1j/lilovusopidal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=types+of+ionic+crystalsPDF 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

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_off00011c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 20256 bytes
SHA-256: 3b64f5212a7b451d605c6594aec4d603e2b954fcf63ded5278d48207315acc79
font_02_sfnt_off000167d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D3 10552 bytes
SHA-256: dde4152cc9fd36a16deaa530013663be3dfbb2ea8075cdb09d7f21b74447552c

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