Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd290f146916f68…

MALICIOUS

PDF

79.6 KB Created: 2021-09-08 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d1f8315d75f4076b9f552c4b9bdeb843 SHA-1: 388bc3e2f79ea98b8a91d80b1b6cf7bd5ef87b77 SHA-256: 9dd290f146916f688c0fd0c8b146af171804e127d6d26a2c4b02c5b4e88689a0
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, several of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://hidrometa.com/images_upload/files/winodaxim.pdf In PDF document text
    • https://drproperty.in/userfiles/file/16387884352.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/69l6cbjhplaj1t1u0b15mnaih5/77850177533.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/99069873601.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/sadow.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/zodip.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6dc08e4df---40642115249.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/61246199233.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/5d40e2724088fb6a4e166aa341bc0c19/mevawugosufibizet.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/firebokevusekuzo.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109081548573682.pdfIn PDF document text
    • http://cecev.com/stockages/files/xipaxelivojajivus.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/98822470866.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109021421185498.pdfIn PDF document text
    • https://turbooto.vn/upload/files/94028342899.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/wesapuxuxolipi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613040b843229---8427822646.pdfIn PDF document text
    • http://sbairs.com/datas/files/sovusimobepudezaw.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/8fd8c6110209be689c3e02d297cc2735/64652505459.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/remuzamodamafusoweben.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/nevedunojevilakofo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/1776218581.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/vunalane.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/daritunepekuxuzekodijil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=embroidery+manual+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_off0000d3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C2 17520 bytes
SHA-256: 69676acc306aa8fd5a42cd37a32f6dc25a9452c01bbfbae819dd57bf2460a447
font_01_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10728 bytes
SHA-256: 47044b0a50bc5dc4d905180e3aacac33b22162b65d9bce25d09fb4b03f9e2b10
font_02_sfnt_off00011924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1