Malicious PDF — malware analysis report

Static analysis result for SHA-256 1216bede54357d80…

MALICIOUS

PDF

77.8 KB Created: 2021-08-19 17:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f765b3508d04a227b468158c289c857f SHA-1: 489bd577a7e956bef14e13b8c5d69b26d389f8ea SHA-256: 1216bede54357d80099c59e2163d3d2414bbea69e52eeadad0ffa3477f57c5fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to redirect the user to malicious content, likely involving T1059.007 (JavaScript) if interactive elements are present, and T1566.001 (Spearphishing Attachment) as the likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://soechi.id/userfiles/file/xopivuderiwebusigogetub.pdf In PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/50772312213.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97010029724.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/61302353562.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/93248395751.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8dbb044c1e876970cec513f8a744be1a/vusakulegivopu.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210701201132_gh8cgy.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/7331412107.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/dunesuzasusa.pdfIn PDF document text
    • https://ip-pharma.net/data/files/nodarasegolifivobopebivis.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8f88b9e9---64559644126.pdfIn PDF document text
    • http://gyobel.itpublic/file/44684967094.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075d667ee348---garitufituvorativotafu.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/xefiguz.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/62211739935.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/572ae7d6e2eb36a65bc873c2798eca88/80815689757.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/70211019414.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/xawobudigakudiwof.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/bowanofexijadexu.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/lidivalejomovefikabune.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a57f1d7c1---22744741807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=can+you+hydro+dip+with+paintPDF 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_off0000d0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B5 16092 bytes
SHA-256: 42b862e6255a1708e0447ce15570e1bf27997d36142e5accf8ae9021bb9d515e
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001126c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126C 10472 bytes
SHA-256: b088631dfc7378d70044d90239e50550668c6c32cb68e692a77f7bfa647d9fc9

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