Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39bc65cca636818…

MALICIOUS

PDF

88.7 KB Created: 2021-07-04 14:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fc158268bbbb90ce68b5c286004fda0 SHA-1: 05c7849a43620806a4ed4694f1beb6bebb5c05e1 SHA-256: b39bc65cca636818fd85af03e120d571f7413612a1efcf9ba738d8b9798cc6e5
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The presence of these links suggests an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070f55bd85c0---42150735522.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/q1lcfq9a21op99m9g3k6j4fsi2/85202284819.pdf
    • https://plasy.com/uploads/file/35407077965.pdf
    • https://bakwanudang.com/contents//files/fikafiwiritanunosegulifir.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879eb0cbd4b---12478447210.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/13s0dtm3i82cpljdmvpfetofr0/sugizewilirijebef.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d256f148e7a---88381069894.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/e5ddc74bf4dbdd9457cbf984014c17db/11920861585.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/witat.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d0ece0a4---nefaxe.pdf
    • http://hangtatmj.com/userfiles/tapizawasanezepevamozed.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f0215cae8---47639357395.pdf
    • https://aucordechasse.fr/vosImages/ketofeb.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8bd97375d7d51fbbaabd56cc01d107ce/23407669334.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/dj8epil8u7mg45a83nm3e6t4ra/nevatajota.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c37cd2330f---96245001304.pdf
    • http://novo-foto.ru/ckfinder/userfiles/files/digujufulexum.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160adc77318918---80955634709.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/3976736608.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/b2f594b93e923f5faad7fcdf947ad833/64453245349.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc54314fb0---vurunodadukamoxuzosefuk.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c0ab618879296fa0d15a38dd1246ff11/mokafub.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc592d4cb9---zoxinowevebabaz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ark+the+island+lava+cave+map
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 16792 bytes
font_01_sfnt_off00010fd0.bin
501a045c31c6b572d462ea6a7e3b387c65480abd40b3f6eb4a96a518dbc22b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD0 10800 bytes
font_02_sfnt_off0001288b.bin
f47bf84f4cd5a2b44bc661d307d1d55bd25b360da74cd88194cd80d017724997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1288B 17220 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.