Malicious PDF — malware analysis report

Static analysis result for SHA-256 e914b7f814c4405e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 23:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 15dc8e0a12579e252cc5ba08d54b6427 SHA-1: defe0e6d087d2f51ecbf9357c0545b03ae962695 SHA-256: e914b7f814c4405ec570015bb17a6d98d12fb03afa02b8cd687c28a7b3508c4c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ketchas.ru/uplcv?utm_term=turtle+with+snake+neck PDF link annotation
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/4d10e1efba11ab65c3228587b9c7a3e7/fisosemowogoxunufe.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/xefubijum.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/75816834275.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210713052203.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b00aa3f56b---73125876934.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aec7165125e---ramotozetobafodalixe.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/45297517758.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/88234337060.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/wupunudin.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050517432389.pdfIn PDF document text
    • http://c-amc.com/upload/files/99688504988.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c00f10cae70---46845031199.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/88769319148.pdfIn PDF document text
    • https://haidangpc.com/contents/files/bisamidoguj.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/92986983549.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/dobimevolul.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/c85odng1132p0muqqlqhv0j71a/63173188128.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985a661cf30---vamegexulerodulutup.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/f26cffb6a8054c92b7f84d7c8e48df98/pulewopajated.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/93280853723.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdb4d6697d---79792344259.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c5797b41f2f---zetegebifowidosezipab.pdfIn PDF document text
    • http://fnathservices.com/upload/file/dexubetiziwopexuxeto.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/vinatudiligefamifej.pdfIn PDF document text
    • 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_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 10448 bytes
SHA-256: 5d6a2d9dc5af4056314e8a12e0104d3b9225657d3d7c34c33bc596913d4f1087
font_01_sfnt_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 18220 bytes
SHA-256: 83300f512058126eb7574322964722f71ddfae63f72e82f39fb338100fe02285
font_02_sfnt_off000128e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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