Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93ce5c8698ecdfa…

MALICIOUS

PDF

72.0 KB Created: 2021-09-27 09:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ccc7291d4b0df5659c8423e516b6ecde SHA-1: 6839937c05e68e45405c7e5f9de53bf7ce8c9674 SHA-256: d93ce5c8698ecdfa4b63f97b8cfe236f4dc5f5cc975effe37f4a9fd5cf07e3b2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URIs were found, many pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of many links strongly implies a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=cpu+tdp+calculator PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c44a27e91---13365356267.pdfPDF link annotation
    • http://eaas-journal.org/survey/userfiles/files/judinotedegomemiribunik.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/42497785476.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/mixakofedowawavibi.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/gobolagutem.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/81940937556.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/51752196273.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5eaabc7fd---pokaraxabawuzugejewebib.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/32388368612.pdfIn PDF document text
    • http://guowangcable.com/d/files/23669191905.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e098945453---78427084338.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480b2c3f84b---26298418982.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/58540100724.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/98933118259.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/rasupivawori.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/babilizoduwazanifeloka.pdfIn PDF document text
    • http://identik.hu/editor_up/dinopexamigubamewika.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/52232015441.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146eda761323---miwuf.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/mosarofopexununodewu.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/18405899885.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb8d8f53c---12697773024.pdfIn PDF document text
    • https://italvaping.com/file/99144392746.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/2771156728.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_off0000b50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50D 10144 bytes
SHA-256: 1e4310baa9b49bbffd287fab60b3692ec96d506ccf920a2af8ef9519ac600b77
font_01_sfnt_off0000cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 17920 bytes
SHA-256: 3c9a0bb817124e4d1116712b50de78db8319044147bac00c9cc5a29fc3aa0ec8

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