Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae442ac530adbef5…

MALICIOUS

PDF

87.4 KB Created: 2021-06-28 18:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-07-13
MD5: 9033333953006d880a45ec5cd7194a55 SHA-1: f01862607ea7e49b37203b1cc38b835104720d7b SHA-256: ae442ac530adbef5330447514ca5a237c7964d0106fe2f2814f42e139079a74d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5cfe85bf5---buvaduzut.pdf In PDF document text
    • https://hohsingfiber.com/ufiles/files/73778368227.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/79426517831.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/463198470e52378e5f2e0951d2f6245b/65671844827.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608999b3bc986---dobekexivewisasuguloke.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/96288159353.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609300e3a3826---37714119239.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/i36gm8u8cu4kah16agsas3he04/86758017329.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/towafipimotomoweki.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/42464601573.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/bpe5ang2egguoj8vs6jt0ov372/voduxokuzunoguxute.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/79200605452.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/47569908382.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rpjtku7cu5fht8rnritp5esuii/dedivuwologajir.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/deboboriliv.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/dobepivenuxutivodobel.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///31857152756.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/dowajapogadukafij.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609560a0c708a---45573519243.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ac2f03ce---86742822444.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/pnsg8lk2m47pcmctd28v71sdv4/tutesolulibinolukatarusuv.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/tovojusibefada.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160882e03f0cc9---mediw.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160708c7d56142---lafofefazeratalu.pdfIn PDF document text
    • http://www.hometownfavorites.comIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=appian+way+pizza+for+salePDF 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_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 19528 bytes
SHA-256: 8b547b5f1f558bd38886dea351a3b6d8b9995e237d48643945164581f26ea649
font_01_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13893 10496 bytes
SHA-256: 2613c58839bbed303d9b80614bc12be9bd0119acada144aee20d53657f8a21c1

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