Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1219fce302cae1…

MALICIOUS

PDF

98.5 KB Created: 2021-08-14 01:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: be3ba475a9b5012ea70002bd00d42f96 SHA-1: 0b2e4a3339d6826ef219ebd842cda9a8df878cd5 SHA-256: 5c1219fce302cae12551d9db7b37e405ac6029cc5f3e05479ab3097104b5e1f7
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, indicating a phishing or redirection attempt. The document body is heavily obfuscated and unreadable, but the heuristics and URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://vegas-shop.net/uploads/files/relimatasololopi.pdf In PDF document text
    • http://insightonafrica.in/userfiles/file/xisejo.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/39985012351.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa289c79f2---xumufokumowumuzavum.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae58d0749d8---gakekirajojafe.pdfIn PDF document text
    • https://anfauglir.com/images/file/90737120435.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/buxosi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6e5e124a3---22589928721.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a34e7b1f2d8---20001970326.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/ium7eellne7km2kg7n7bt6p7md/baxuloxukadoxu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/e3764801cf0842d44b5070af728a48e3/jemulemoporiguwojoviwala.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fuzalapu.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3fcdb3d76---23043033556.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/konadajamazeximiwa.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/97199096235.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/57258545409.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f72e7446b---ziretinaxu.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/mitodaliwugagosokenegubok.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0b4f7c799900b3b9891dada9703d9d03/10391498092.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c69cb78591---49703178363.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/ritidulugagimofoxipe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/5392572b830b6f28c50c35ad3d5ba049/wenovexu.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/54263743065.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098442b91ba8---59627396963.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/19507797492.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb03674a39---34429712601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ebook+gratuit+developpement+personnel+pdfPDF 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_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 11220 bytes
SHA-256: fed53f87ca365e68058f899dd6eb9149d1d58755a00a9fa6ea0471e598fccfe0
font_01_sfnt_off000132bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BC 18348 bytes
SHA-256: 17a0e333d697308a44cd9af43960e080366cb591b7aec3fc1ee9b02b6ae7fc7e
font_02_sfnt_off0001611b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1611B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1