Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2ebdefb4e0b4d5…

MALICIOUS

PDF

103.9 KB Created: 2021-08-01 01:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c04f3a8318cc9192beac6dfb8efee62 SHA-1: a05cd23a4962ba16f4bdae6dbdef73675e916046 SHA-256: 6f2ebdefb4e0b4d5f7cc495bfd9c1351871037e8a39492a2cd3c675c091c0dcc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing attempts, aligning with the 'Pdf.Phishing.Trojan' detection. The document's structure and the nature of the URLs suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3685a46d---butenunutafegu.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ada5bf03e---totadufarawazanubomagani.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/sodafokifukajukukobowo.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/36700024268.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/97127687753.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/38652181401.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ba40b66cdb3---49771750400.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcd8ab847---29949097680.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/230536129464.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857da04e442---xufipotawar.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083f73817ab0---bagozelirokidebujawufu.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/litojidikifi.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/mawokowusufifiwijap.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/texipudag.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/fixodasogomir.pdfIn PDF document text
    • http://blueyee.com/upload/file/202037244937.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/89889765262.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/8614697313.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/tivixalotewuruviwu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d78e2ea32b---kijitofulesokosex.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/xezixipuxaj.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/78445376205.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/b3c1bad40867ac159eccadbb7ee74be2/tazamipigudomolajutobed.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/rg2vs6rl3kglq9fo175911lcb2/buzobisubis.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/58753263604.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/rogefetojanetatefam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=is-235.c+emergency+planning+final+exam+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 11384 bytes
SHA-256: eec380728e3a634c686a185473fc644fd27d80efb87345c0c19b0190d0f43991
font_01_sfnt_off0001497a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618C 17224 bytes
SHA-256: db4e4c94427eea13a39b9c59e74cf3e7dbb8cae5c61c13caf18efd9da3f85729

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