Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0395dfd6108ab25…

MALICIOUS

PDF

96.3 KB Created: 2021-06-26 07:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7632150264290e9a20f1efc25e3a3f06 SHA-1: 226e3bf6ea7dd0cd81b806197b77f55b6318a432 SHA-256: b0395dfd6108ab2553d68ceee400c7295b9c4f9ae17f9e2246b2cfa6802cb348
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple URLs, some hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification yielded a high probability of maliciousness. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9486

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://virtualpulse.eu/UserFiles/file/46364661360.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1c519d09b75bd5de5e40bbedf6e8eeeb/jituxubeveri.pdf
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c1a62b93---pojarunetabaluziximalex.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/p23hkqgpr30k5l9801nq1rhbc1/87168394085.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd393a129e0---26653012736.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b877abb2e3f---neguteti.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/255a35b93a36bbbfe5436b8eb615371c/sabipawinuja.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/30488ec0c07a84d77809d2ccd05381bc/27299281443.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8ff9818da---nexaputikipasixu.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609121fab8542---14426325693.pdf
    • http://duancanhotot.com/upload/files/mexoribut.pdf
    • http://skyfestival.kr/ckfinder/userfiles/files/84012161205.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d870040e14---zigegifezebiwegopoz.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e465cdd28---vitexaworakizuzemamolid.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfa89b267---dobobukuripasaxo.pdf
    • http://temple.mo/userfiles/file/nufobuxidi.pdf
    • http://sxhk365.com/uploads/file///38236244517.pdf
    • http://oreade-breche.fr/userfiles/file/jabodijubujutejadu.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca0a8dfdb---tuvisafonigu.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943f33584d1---jorepigarufidulufebososu.pdf
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/gegozakomimed.pdf
    • http://hongpakthai.com/ckfinder/userfiles/files/13147268540.pdf
    • https://atcotourismtravel.com/userfiles/file/ridegaxenudidugiwa.pdf
    • https://codecs.roimages/file/bejerujafejiremo.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/674c053a8abe5dbcdd1271087fdae3ad/jozodomulilarijizijagaj.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/u575akv2ei54k1g276tjptthh4/43030267830.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=felicitation+meaning+in+telugu
    • 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
font_00_sfnt_off0000eab6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 16792 bytes
font_01_sfnt_off000102c7.bin
76b2ef4074dc81bc4868e347b402926a52127a2728751881616a801cb351e66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 16656 bytes
font_02_sfnt_off00011a33.bin
e1a5bc4745c1a54370dff5b5d86555593f6f6a75eadc206ee4bf3615ded44634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 21256 bytes
font_03_sfnt_off00014ffd.bin
25d6f88bf4b9332277b7b2b2086e21ff1049ed3a67a0bb08ef733086d69871c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFD 10384 bytes
font_04_sfnt_off00016769.bin
a41e9bb3d4715db75fd1ea0400d009958489df0efbedd153a7f60f4950a6a029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16769 2036 bytes

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