Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2a977bfa2a849d…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 00:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59cf743750f9d4088e4ffb153a187d8e SHA-1: 9a8c16fd4639b3988f76916543529d010485536b SHA-256: ba2a977bfa2a849dff589519986803ecb98c756807de1d673789b9922f163c77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://catamma.ru/uplcv?utm_term=total+surface+area+of+triangular+prism+calculator
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acaae87be3c---13885622339.pdf
    • http://batiment-tunisie.com/userfiles/file/zedubidasezovifeso.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4243b072721ea6f207fb81cc635add61/xisopifufusiretosogurobax.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097be8ce04ab---73332467012.pdf
    • https://efnnma.org/files/file/puxawag.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968f00be279---milopinelofekare.pdf
    • http://salon-urody-bellis.pl/images/file/zibesodokefevuza.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/md0kksur629b7no52f7158de8l/raxikobajonumumeroz.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b252827439911b35d245e3b71dc4b1ab/99946402861.pdf
    • https://artbynela.com/uploads/file/96740604418.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1dfba042---wamane.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/8b93ef40229f9bdb37fd38ba2e0d4958/waxajagu.pdf
    • http://instant-image.net/UserFiles/Site/File/jujoleduvizujotipasakim.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/iponk2tmuhl53cv7cploj3kh58/seniwiwal.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/jvc91uouuroud4k8fvhjakvv5o/24538142802.pdf
    • http://anthonyvienna.com/sites/default/files/file/ladavamuwil.pdf
    • http://fertilityupdates.com/userfiles/files/27420576831.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0afd4efef6ebe6181b0d6bc5b4671a4f/faviwaganowok.pdf
    • http://cga82.com/admin/File/96172547555.pdf
    • https://asiarsolutions.com/userfiles/file/jivoxukotaponukilekamo.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l28iof0cn3q6nauqbdhm43vikj/71575611478.pdf
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/vawivavudogumujugosazil.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0275cf2f---vaguteremuxukujatigemenu.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a3a49a11b537f65dc74527d829d7748a/zogorenodukokim.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3f1c9f97e98216a970dc190190e463a6/kadumedavigupekodova.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ba56d8fe87ba344cd745f424311e69b5/nejimolola.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a37a693fd2866adb66caa5aa7e4c5e9b/57586234680.pdf
    • 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_off0000e398.bin
d97b6ffe1092aebb0b7870c2ae5f2531fbfdf35e25435ab22fba49220ee5bab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 17892 bytes
font_01_sfnt_off0001131b.bin
68770efa000d8c881bd0afafe5f5fa628edc4d5022389e773dc9668cd4517358		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 10888 bytes
font_02_sfnt_off00012c50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C50 16792 bytes

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