Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe27e5832e5d1edb…

MALICIOUS

PDF

96.2 KB Created: 2021-06-27 11:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2aba01f699b60d8b60dc76c9e27f67b6 SHA-1: d4c08cebba7534e49ec5d61a7fd770f795c4131c SHA-256: fe27e5832e5d1edbc36cb7fc72ec0ddaffbc7828d36883b150ac4384db486c35
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://mawaevents.com/uploads/file/69103786331.pdf
    • http://karpatskiles.ru/store/file/gebujus.pdf
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/21440208178.pdf
    • https://ilmercatinosottocasa.com/file/8469886349.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882a21cc3df---80104103081.pdf
    • http://asianmosaicnyc.com/userfiles/file/85683814049.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/16959088907.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1ab3f6ec---68889064018.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/oqrvafknbrpp4atid7qbhohdga/ridajelusezapopa.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/q6q9nk5j1kup5d5n57hk063hn2/6759024678.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/xetagubozirisanugavu.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16078ade3e4871---15846071043.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ao0u7gdq487oqur2e6m9une4u4/97516251334.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f106a907c8d3e0cf624cb43f4776c5a8/sipekeluvavolorafe.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/r00ps6bmoa2iqjsth77kvg03n6/85812342748.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/7bbec7a60c36a90622b2b5f66afc72d3/nipediviwinaxelarexumuj.pdf
    • https://mytopics.it/uploads/file/14986284006.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/bozenanoripo.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/u2jl2s7ouqcv6lqddsdbmc1cp3/18271499142.pdf
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/32271171838.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee5550412---45335471860.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/1f486efee7bb6edd6537e48f887ff363/56351337257.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0q0gejfsbapgka4u11ks8d2g7p/luvaxefopoliv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=diplomatically+meaning+in+english
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000150b5.bin
e8e8fde2c4a67733a2cc6dd8be6c464bfbf81df2e96ea158b3f59571c56d197a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x150B5 19172 bytes
font_00_sfnt_off0000d5e3.bin
735890d45ae1b8372ff347b1d8e3ae40fa28c1bcc3416be2a54129c780205b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 24164 bytes
font_01_sfnt_off0001124a.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 3464 bytes
font_02_sfnt_off00011fc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 16792 bytes
font_03_sfnt_off000137e0.bin
d35d289a6cfab9dec3d2b9f38c5b2754eea6ee395b860300f6abbaf0e05682da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137E0 10836 bytes

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