Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c5cee102f8846a…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 02:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 01ee2ac339d96f420693f5c332918588 SHA-1: 7bb6acf2fa42cff19cb7ec864c1bc953e617b0da SHA-256: 17c5cee102f8846a8a424b0b1df2033fdfab94e7a198749792dbab0c48444bb0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=bodyguard+series+online PDF link annotation
    • http://www.iece.in/userfiles/file/xisilusapi.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/zodibupomedotagozabi.pdfIn PDF document text
    • https://inprovitbolivia.com/ckfinder/userfiles/files/gagivamefapilisopijaxom.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/fewupoti.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/dubiwujoxuwo.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///xovevitumadutisogoduv.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/22251855957.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/68147574269.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3d55p39kfis3kvci7k1f11kqpl/bavibe.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/ginizidiruwopuxilegal.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/31337833016.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/pebef.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/xafatosuwanok.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/82fmj7ahddmv1j1dl6cju85ci6/65925133417.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/2504982169.pdfIn PDF document text
    • http://boldogelet.hu/media/96452092202.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/jumefuxu.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/24337744016.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/419060379.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/95378985659.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/28076968135.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/dinojig.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/81042000797.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1f20fee6---18017249754.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210909_D89C15CF39A8595B.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_off0000b9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FC 10592 bytes
SHA-256: 14e427d54e8ddbe3d49d09958e206dd13500c0f89a2cdf5f3335e19540b1d9c0
font_01_sfnt_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 16944 bytes
SHA-256: a894cf06b49c03e4da3002ce212b797a3c5d98a879658ba45dec1dc698e6caba