Malicious PDF — malware analysis report

Static analysis result for SHA-256 faab3bf80da6df0a…

MALICIOUS

PDF

81.5 KB Created: 2021-09-07 04:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de6110c01ff5f0733cec1bf95114a93c SHA-1: d973a7f32f9d5e9ace56848c0463d7c8e9664fb2 SHA-256: faab3bf80da6df0acdda5c9ed828a51160742f913f51602aa82171f88c395c7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate the document is likely a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160874c7493d60---58959581679.pdf In PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fb04dbac---gipumeta.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/56543539219.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1cbcbbd77---9303367474.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/godopadelu.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/redimetinep.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/73330194559.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021071616300846.pdfIn PDF document text
    • http://saens-jpn.com/ckfinder/userfiles/files/1736266305.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-3/20210603130441593742.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e0de0363df5---63923819609.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/sunovinuwuze.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/a4249a9abd399f4480b90a874edd886a/zawuwavakuxubulagilason.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/fajusixafe.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad23321618c---momubukiganebunepen.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c1da129dc---xujisokafata.pdfIn PDF document text
    • http://kim-clark.ru/files/file/19314720984.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7ab0a7249---leforo.pdfIn PDF document text
    • http://prota.ru/upload/files/kuzaravazijotifexaji.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/nabixifukefig.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/77agupmqp51geikqlcs53ngnq7/tuxusolepinusofuva.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/i2nqr6uevm9p8aksms2587s916/satij.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/63870469029.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/62438745456.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702326ecf02---38708933725.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/dccb90473db730f69cfbee6417942153/pimasakavokeweluwawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=b%C3%A0i+h%C3%A1t+cho+con+nh%C3%ACn+th%E1%BA%A5y+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_off0000cf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4D 28340 bytes
SHA-256: 842f74f10fe928018291a0173938276dfb98bb5723a8d9e9ac7e6d5e0283625f
font_01_sfnt_off000105fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 10912 bytes
SHA-256: 516c990c10e0ab063482e814d54430597d76b58954e1ea5c7001079d8f4cf2ab
font_02_sfnt_off00011e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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