Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c6d91e24100369…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 13:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8853c31ee9b8aa2f8bc506a1e92474eb SHA-1: a72d539556f20e366f869634df8e634324f3fd7f SHA-256: e3c6d91e241003693a9eda818901d677dab91c633a09326d45cd2e12195a795f
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites. These elements suggest an attempt to redirect users to malicious content or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160fac893b250a---89660693253.pdf In PDF document text
    • https://kakakmanis.com/contents/files/55982298008.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/11730536121.pdfIn PDF document text
    • http://halaljones.com/uploads/files/61685628059.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210906171821.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/milaw.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/sazedibelezoritijej.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5826781bf---tevab.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/pimite.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/gezusekulakutukitemapeku.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/65623661124.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27948066f---resaturemomeje.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/lajemuwofifijewatanoxaz.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/duwarubokija.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba44c24b6---40436784615.pdfIn PDF document text
    • http://127.0.0.1/kardelenemlak/upload/files/rajaxoxijamesukuv.pdfPDF link annotation
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/af328cbda5f895e5e1e1c8b990870934/kudugapavugenasojomosewep.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/95795730480.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/91908096430.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e9941da7---90070643360.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/92684537497.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b700a0eea5c---37216921921.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/aqqjuc15frq788kuso8cfm53uc/50002958514.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c325dd925fe---47349250107.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/10430478222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=regrouper+fichier+pdf+sur+macPDF 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_off0000d8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B2 19860 bytes
SHA-256: 5a000c26463807fba7bd0ce842729c5f5f8cd81d9ea63a593740973096089cf4
font_01_sfnt_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 10964 bytes
SHA-256: 8f87f4b11461825b2c1b981761413762c0815059f090132818c98b67a42b4448