Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2d149d938891cc…

MALICIOUS

PDF

99.6 KB Created: 2021-07-03 08:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1185d5f18414c21115c33278865b1266 SHA-1: a70eff1622d31fd87f88f0686dde97844f785001 SHA-256: df2d149d938891ccaef2c083b07f878a959b5cfee14b41ff8699188b38d8b2d6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

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 http://capital96.com/userfiles/file/73611166714.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/vawiw.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085bba27bfa5---lenoxa.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dd795cf90---35894787046.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jegaka1d6ea23vb4cu3i1mfitk/tabipa.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608794f4c2d3d---93625054809.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63553424c1---bejeponogisaje.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b62480f575---9418739238.pdf
    • https://liniagdanskzydowo.pl/files/99754264684.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/40cd3c4f845dba7b1abbf3637d668e4e/46883811236.pdf
    • https://menuiserie-sainte-anne.fr/userfiles/file/43090158096.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e84c8cb7410d548f31e4969d542a9c04/13789726502.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/mitubukivodirumozujujosa.pdf
    • http://kalmi.ru/upfiles/files/83291726483.pdf
    • http://retroldn.com/userfiles/file/kuvemususopif.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933f042d539---kanitisebamugazo.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b4b9bd8bb---85760888763.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/3e86d20cdd0c2a9c0155dc97ccf671f2/dibafebazokas.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/44c1e5e7ad5dc0c700ed9323459fa58f/47074930461.pdf
    • http://bright-mineral.com/uploadfile/file/2021052016545229.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a557ba9dde6---tesokegata.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/20b2bcf41a2bd70883dd355438401487/23520448069.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ouril83ri7g1960ff454m4uoab/belose.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd4114a34c---9780531388.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c884d2caf8bedc27309aaea792bfa93b/folumoxebatudavebi.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f9581f34d---xozedaxibi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+put+cinema+on+firestick
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c3b.bin
f18562486c789e18ebdf9a17a66defbce09fcb07b48e6fa736cb32d2d9324061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 17452 bytes
font_01_sfnt_off000139e4.bin
0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139E4 16088 bytes
font_02_sfnt_off00014f18.bin
8aadf98cd60f371d475f80e600720d30c29b4dc0b9f6741cb1694338b64895ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F18 10864 bytes
font_03_sfnt_off00016840.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16840 16792 bytes

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