Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95b97b6b9e2e0d0…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 20:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0c15050fc8a7bea5decf36a9a2453a2 SHA-1: c33e4b6069de13535812a0f7643bcde831408914 SHA-256: d95b97b6b9e2e0d02f4f691e8b52e909205c450ffde6642e691a3a1ec308aff6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics confirms the document's purpose is to lead users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://cructi.ru/uplcv?utm_term=mechanical+engineering+aptitude+test+questions+and+answers+pdf PDF link annotation
    • http://stl-hk.net/userfiles/37330781078.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143c4a98f318---bavufabudikofupom.pdfIn PDF document text
    • http://horvathortho.hu/tmp/18824112357.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/29713427769.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/24550883390.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/fewujesuxanik.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/47264610156.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/sofuzepaduzugogumuvige.pdfIn PDF document text
    • http://yilip.net/userData/board/file/mawatupupijo.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202198210416988.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1630485312.pdfIn PDF document text
    • http://c-six.it/userfiles/files/48607650179.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/29812211135.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/62110525165.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/hg24npa1hea4c5kh50ddl8e5is/45666788362.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55c0d158f31766deb1f61f6511f5eeac/pepovijuzopiviwob.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/pakixusuzej.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89546165303.pdfIn PDF document text
    • http://gestioniarmatoriali.it/xidubupa.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/rarifepotaxas.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/mulixazur.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/72956141816.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133fc5137bd3---viluruxojikemabilazawixe.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_off0000d5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 19556 bytes
SHA-256: db2dc1fcf58c181fb16eac27ced21eac2ac15e434e5d6b29daf6f8a506967349
font_02_sfnt_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 11224 bytes
SHA-256: 1226e9a7e3256edb0fbf8dd87fe8c8687f54ae52587c35608be1fc4917930237

Open this report in the interactive analyzer, or submit your own file for analysis.