Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a68a03ba49527f…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 16:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e84b8cbbbdf1feec77be140e1056c8bc SHA-1: 9afc4f3fe55a6cd5b08c0fec9507ffccf3734894 SHA-256: f8a68a03ba49527f902544dc10bbb487876ef4226de17a0266a68e4683c4f688
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely directing users to malicious content or phishing sites. The embedded JavaScript, though not fully detailed, is a common vector for further exploitation or redirection. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://coretry.ru/uplcv?utm_term=vocal+star+vs+600+manual PDF link annotation
    • http://medi-sen.com/files/files/79517424133.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/89052390409.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/febewusisupewe.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/28148429853.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/510c179d24b8f275c43bbeaedd34bbda/65835477387.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/55081385962.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/15292036349.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164f23fe96---75507312550.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/zogowuguliborinibet.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/lesumuwotozuxisasemisewot.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/19633037133.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/47796268872.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/kubuvaw.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/h2j0kl4jdlctthk3u27mbq430a/delotetumobemetoz.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161337f91ce242---46478451881.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/gatidoselowetonovot.pdfIn PDF document text
    • http://grupophi.es/uploads/files/motefakisemewesureb.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/84375814717.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/4813976940.pdfIn PDF document text
    • http://zenkatsu.dk/files/99210547289.pdfIn PDF document text
    • http://wenxuezj.com/images/File/38580279597.pdfIn PDF document text
    • http://vinhosnorte.com/images/files/pobewuvubopamikad.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/vafigaxazalolakinezojidi.pdfIn PDF document text
    • https://granitnet.hu/editor_up/bowatevalezolodezirepam.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/kukejapu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2c2b323bfa2eb25f905274949a06c74c/janemodemesosemonozu.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_off0000d29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29C 10592 bytes
SHA-256: fdbe6ba7b7337599f14566475dcc34d08ee42d653f1812e356988af2170e93bf
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 18880 bytes
SHA-256: 27522e25b53ee882ed8d230853108692bba0391f32fc1523371c483ad1335448
font_02_sfnt_off00011bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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