Malicious PDF — malware analysis report

Static analysis result for SHA-256 60957caac539cbe8…

MALICIOUS

PDF

140.4 KB Created: 2021-09-03 22:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 205bcc85933ec08d1ed96c368f5a4b51 SHA-1: 0ca83b0c02b26778508ea0697f4435e02fcc46bc SHA-256: 60957caac539cbe8ccf4a83cbee13f797e928c3586ce0ede98470448d82af98e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which appear to be compromised CMS installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fabriziocar.it/userfiles/files/miwezokizejuxojetatajufi.pdf In PDF document text
    • http://innovatepc.com/userfiles/file/papafawef.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/7518c7c941293e5d73aaf15e22a7cbf1/6532063352.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/dk57e4f5avptt6dogqth5c4sf2/vewivakadupedogux.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/65132575928.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cdreejs7f8dogoi4c10vss8spo/51445023299.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/5s7q60nq4iftl47m39uu9sp007/74136447896.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/sumikexemerikesodave.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/mf95i6ajj7jvrh122e1gt04g70/tidajubimivikonofonogage.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fdba2f50---wefelotebazazas.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3342bbec3---16981101097.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/69401147800.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/keran.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/38773159665.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/jqml4tl5jr0jqejmc6nnqfasr4/77341521601.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/a49r65dcai0q16ujoatf9tgr1p/kumatatulodumokuwujujijo.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/jeterivotivarerox.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/63332757498.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/53lgcvh5ia2g6p64s12svoljas/buzusegubirerafekinijada.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/gerewatemem.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/ba27dafd6529a010db3007e4b28b7c92/bezesufemopenabidiwo.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/59273019351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=parasitologia+pdf+boteroPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1E1 10712 bytes
SHA-256: 9bde0d6e332cb10e0d5e94df7b61148bc9923eb7a26116dd0e09d27308d3b09e
font_01_sfnt_off0001ba28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA28 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137
font_02_sfnt_off0001cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF9B 23224 bytes
SHA-256: 009b29e4b8a3ca810802f52c228825c2642b2fbf0630fc0f002e0a3c0efdfd53
font_03_sfnt_off00020b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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