Malicious PDF — malware analysis report

Static analysis result for SHA-256 1148cb929c0a793b…

MALICIOUS

PDF

92.2 KB Created: 2021-07-13 23:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57933972fe83a06bf73d3b8535b76898 SHA-1: b2d4c8014816cc3739e4f20bdd641ca696c3c761 SHA-256: 1148cb929c0a793b7ba68df65b4c2917f5529e11ef342ca022e9fff464d2aec2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055 Process Injection

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://fructusartis.com/i/File/gagusidimawor.pdf
    • http://chemonova.com/FCKeditor/file/zazadadigulubijituwosigo.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072590156510---tetomifuxalakodexirel.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a097de36eabf3c30167a12d989fef6af/darapegisimamusunizejapuk.pdf
    • https://chaplains-camps.org/upload_picture/file/mitimufukufijovudesa.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ada41a45c9---bepujojibaditogazolit.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/e5a701b2b5d22f7ee996242078075820/61823779457.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd016b1d5e---38396261920.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/642f3808d983eebf11f4cb6094979714/zejasutoninufilin.pdf
    • http://paoladebenedetti.eu/userfiles/files/55681123818.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/695dee40bb86a4ad836741c4a87e1b89/69109951215.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4474b2b3b52ab1e4587b1f15c79b94c0/60679152962.pdf
    • http://etcad.net/np/upfile/file/xozajowilo.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d1caa60a0c3---34608253333.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/eae9b47fd79f4833f631d4f22f3efcca/dudiz.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/d6f9809u1crptu9n2qkhrvpd62/pubarekedosegofadolebub.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abdf981c01---55212962514.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b837137a6a2---xexeziwadusavaxo.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/871cbd1933feadcbf7f3b38f24b72af0/4280603949.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160805090e8762---24382414333.pdf
    • http://maciejabramowicz.pl/upload/files/file/28219569782.pdf
    • http://dallapietamarchisio.it/userfiles/files/zavaligavejatawarex.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e1c736b7d85---tafoxitegegibufovetaxor.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/l7n4n9a7853k8t1g4cphrvd6pv/79977549538.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2cad160fc0358f9f48d684fd3b48df73/gopuwikev.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=birthday+prayer+to+a+sister+in+law
    • 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_off0001053c.bin
12e54914e27dcca3097467b21a96c1d35c3c61d8b81ed70bcf100c06f8cb7dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 17296 bytes
font_01_sfnt_off00013289.bin
5ff431352b78bbc494cab50dff11601f673cdea2c2514362c68059428ad55cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 10740 bytes
font_02_sfnt_off00014b40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B40 16792 bytes

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