Malicious PDF — malware analysis report

Static analysis result for SHA-256 78db07589999b549…

MALICIOUS

PDF

88.7 KB Created: 2021-09-19 10:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8e1bc42ef71dcd1bdba00d5763523da SHA-1: 55683a83b6c3620630db42792e5ad6e0135048fc SHA-256: 78db07589999b54953178c91c1d58fd85e4e4e843e7538fb3b67b04584fdd5bc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs users to open a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/uplcv?utm_term=gift+1966+movie+watch+online PDF link annotation
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/v389515j84s9c0lnlurrqhioa4/fakiwalag.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/senozozu.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/bipagenetaka.pdfIn PDF document text
    • http://texmet.pl/userimages/file/20584893340.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/nazazewekokalerajobotago.pdfIn PDF document text
    • http://kezmosas.hu/files/file/30946524784.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ph99u5dtl2v9n39jelhmqmnt8v/7046641015.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/xuzikuxabutekiwejedeferix.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/fuxukodabibofafuwisuv.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/nijariravi.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f71ffb86a4---29429525705.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/lulodusiwugegulef.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/bivukitadajazawafeba.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/23194690606.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/thbcpsmmjl8mduj91iadedf04p7k2la6/13245784031.pdfIn PDF document text
    • https://purefeeling8.com/data/file/vigalonejuf.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/77551745352.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/sitozagejenig.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/gapalowolarolotonapume.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/31639692866.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/60567067856.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/kedajoza.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/bakolixawutewadodivibofi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/33122542721.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_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 17596 bytes
SHA-256: 93b514b35e179da67ac47cd5375de7ed3e564b397fa3f2e3d61ad337e91489e3
font_01_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCB 10912 bytes
SHA-256: 2bc018b5dd0045162518ad2fc0d39c2f4a37b22492b3e5a58570c16afd2d0546

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