Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5a87c83b5d85d2…

MALICIOUS

PDF

191.8 KB Created: 2021-06-30 10:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db79ee7afd878e4879b663cd69730a4e SHA-1: e34f3b819d3f50d5b1bd80c815931cecb9517d44 SHA-256: 0d5a87c83b5d85d2d446ca13c235e18c8257a19de64e3f2622725e02f2d37ca9
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a QR code lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/q9rbv2n3l7bbd9p4ketu54oig5/13485581711.pdf
    • http://szao-spb.ru/images/news/file/didusolokiruve.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/252e693dbc130a297c45532638045c1f/45828578725.pdf
    • http://diennuocdanang.com/uploads/image/files/zobon.pdf
    • https://ratsimae.ee/media/contents/file/2136663196.pdf
    • http://lamekatus.ee/uploads/ckeditor/files/25356454291.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076945dd7d3e---pemoli.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ab58sk72c7eguscjeh2ubnrug3/burakakipuze.pdf
    • https://activepymes.com/pub/file/bajatixexiledig.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/xejumedexijajimozuraxikin.pdf
    • http://luxmeterthai.com/ckfinder/userfiles/files/piterazopak.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/pibagunuzumebupuzenaw.pdf
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///202169719135150.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4991d9e78670a0a0f6d3e23b48c56fa1/12824362322.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35350485023.pdf
    • http://files.ibiza-ferien.de/file/98775436878.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd3105f6f---84894494654.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9b838775c6bb1e29e20e128d461228a9/gavodokipafevotawowefo.pdf
    • http://robalton.es/Albums/images/file///dejanuzu.pdf
    • http://tizianaiberti.it/userfiles/files/lokuridi.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab4831e91---15041950673.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160849f0d61ba6---44004983218.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7dd3ca2a6---72843235798.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7aa29cc95---bugatemepadudus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=baby+wakes+up+middle+night+babbling
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002913d.bin
d07d8c84762c289b9a47bfc2884d30e2c34d4dc63b77dced9c598263ca2a3aa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x2913D 11204 bytes
font_01_sfnt_off0002aaf0.bin
6bf3def800e09d5766c55bfd5351b759fef9009b156fb742801448b295e962d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAF0 17996 bytes
font_02_sfnt_off0002d955.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D955 16792 bytes