Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e25d93f09ae07fc…

MALICIOUS

PDF

79.2 KB Created: 2021-08-22 03:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 032fb1a8c1a5e1334d5e34f34a9f74d8 SHA-1: f5739552e77f7386bb08761bf15e3eb6a2168d8e SHA-256: 2e25d93f09ae07fc9fd03c48a790464f040d48006350730e574e6760dca38c2c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/96395eaa13ebf02c22f92a93aea9be91/84935551632.pdf In PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092868cb9b7a---xejibavewaf.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c66b06ee13f---bedozesutolisazigug.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/44985580749.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/gawunukanazorigewa.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/fefoteraw.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078872786def---76638835690.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/24871050479.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210728/file/1627458935.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/h3796kv1ntr7ckmmob6hk6m6h0/xodadid.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1bacdb2dcdb3314cff8fa541a3a4b135/77555572287.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caadb227f11---93891729335.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/gogulexikiwepizirivu.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ng9l4iqb6s8a7pmism6ss98kd0/xazabit.pdfIn PDF document text
    • https://drlanda.hu/user/file/badedivozegowu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1813b16cc---97963294547.pdfIn PDF document text
    • https://path.mn/userfiles/files/70463535150.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/48882359768.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/76237638287.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/legugokajowun.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/renivuravapuxojume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=trig+identities+practice+worksheet+answersPDF 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_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 10888 bytes
SHA-256: e79381c8045802b896530b11a43518e36e68e834edf731db42da2d4b2aa2d741
font_01_sfnt_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 17520 bytes
SHA-256: 95ad1739d7753961e22bcdd47d848396b6cdae24ac223c82a084e831f10b2b53
font_02_sfnt_off00011792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11792 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1