Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a93fb08c6ef4b71…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 13:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3eabab7903711102bfc8bf2167493852 SHA-1: c1321f91f289aff64107494ee10f98e012e2e532 SHA-256: 6a93fb08c6ef4b71727551e99bb8f3bb55177adc21f2109dc524ce8930cf793a
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which appear to be on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI firings and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=writing+a+vision+and+mission+statement+pdf PDF link annotation
    • http://ssatripoli.org/userfiles/file/95142545211.pdfIn PDF document text
    • http://bamila.vn/luutru/files/88104630922.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7a2f02a2b---68231717932.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20654319f---69479485955.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/bokobufanegumejoxez.pdfIn PDF document text
    • https://bdcomunicazione.it/file/jewesa.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c0e15b7ee5a4836f2af2b4b9049fdab8/kemesiseparikenunokomix.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/1545516443.pdfIn PDF document text
    • https://alpinashop.bg/files/xukalapak.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/trejdjg8ll27k9avrr292lh46g/83792004703.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/51597910467.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b6a9dc49a27---31445298465.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/29ec41e04dbb06e6905558074e5a21c5/70058783890.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zuzezipajevufudowe.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609090f0bf029---xogosafevarobekipuje.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/lagaz.pdfIn PDF document text
    • http://web68s.com/upload/files/zunugarorojofimej.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/38091432712.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/zerexivakotonun.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d6467f8979ac84cb5d0499db834c394f/popaxajaxipuzofaf.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612bc86d94af7---tupuzojozodukodose.pdfIn PDF document text
    • http://apsons.eu/files/file/55886527936.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1b6adba3f97ed7dc5fd520e53d04d24b/lidenawopusatemidosozego.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/79966632730.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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 18632 bytes
SHA-256: c2243fd60e1f6a6ec41d84db43458f305b23e800955bf376c7db01bf82e9e2e4
font_01_sfnt_off00011579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11579 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 10852 bytes
SHA-256: 3be55d75f8e7901c857a94f743942c56f53a5133f2d45d3e2b34d3a6cef822b7

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