Malicious PDF — malware analysis report

Static analysis result for SHA-256 208a26d0429029f1…

MALICIOUS

PDF

92.2 KB Created: 2021-06-28 10:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 58af3be75298345c7ae0f4c52735a2cd SHA-1: cc308c9781d20982b0922ce760978d03003c0ac2 SHA-256: 208a26d0429029f1947f3d4994ff39b011b38c7af335dc5c10c622d289cef182
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the URLs and the detection names imply a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://cructi.ru/uplcv?utm_term=pipe+fitters+blue+book+pdf+download PDF link annotation
    • https://palcev.ru/userfiles/file/vinilotu.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/23148948329.pdfIn PDF document text
    • http://grabnerestriche.at/lozikuvufubisejidazeg.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/levasijebezofiwuziratomul.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/28643600725.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/74611340996.pdfIn PDF document text
    • https://lysgaards.com/ckfinder/userfiles/files/14511645149.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/6590678315.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/75437229735.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/22026487242.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/nokurenumebexuduvoxibub.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a077baba06---34911827333.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/879e22f2aff16c2c35929eb952174dbf/keselav.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/85464356370.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607446be7c2f3---doxitiluziz.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/7e6844d6696bf24cdb16cf31eda3ad24/lugeliva.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e47cca218e---wokewogajavukofus.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/mopitoxutimexigefuku.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab93932916---vawagim.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/34556586771.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa436897cd---gafuxalirobufifejifazi.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106120112577765.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 19404 bytes
SHA-256: 09cd8a55d2948baad65699c8d0ed28ac06fea913fbb430866849ed457f7e4cfc
font_02_sfnt_off00012e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1E 10908 bytes
SHA-256: a335f627ab42764a30b815c62c73d6972acd58224013787928667f352d84469d
font_03_sfnt_off0001474c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1474C 17192 bytes
SHA-256: 3391f3b203916041ab30820f5b35ac6b323ec9dd56d0e04bc4e60d8e3275f569

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