Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3496fc8aaca4ad1…

MALICIOUS

PDF

89.4 KB Created: 2021-09-09 03:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 910cb0e1271178b9c7b7ceb1ef19872b SHA-1: 67d445d21316423c87446f1b837923b8c69890e4 SHA-256: f3496fc8aaca4ad18ef5bbbf3084dd52952c73dfd5905cfd539e8b26233c3cae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a campaign to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hilanguage-com-tw.triangle-design.com/files/2245839966.pdf In PDF document text
    • https://flomogroup.com/upload/files/87460194958.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/81364085715.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/70604865595.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136d795cbf06---ribapovajomafularati.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/ebd1821d07a5daae4c382e73ed94d30d/36431196206.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/042c7643f87768364febf63245210fde/wofopil.pdfIn PDF document text
    • http://konakelektrik.com/userfiles/file/74804104372.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/22454399065.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/renagemexipuxibulopowut.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ec7372ce0---xoteledixelu.pdfIn PDF document text
    • http://www.ezmoving.com/file/sexakikexujetoguvulamaki.pdfIn PDF document text
    • https://doitoutdoorz.com/file/dPjdlmr5M2BtDpOa.pdfIn PDF document text
    • http://elementyzlaczne.pl/media/file/16188983271.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/94699254432.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161307748e5911---kokebew.pdfIn PDF document text
    • http://koutingchina.com/upload/files/39779800887.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/sizipekunexogelodumuzove.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/39883925944.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/kefemekowum.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/37735351646.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/xododuju.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/63191807684.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/63861353153.pdfIn PDF document text
    • http://staropolski.net/Upload/file/xabufebimogezakuxidiju.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/kobapasetetogelapus.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/80269877912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=voice+changer+androidPDF 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_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 17968 bytes
SHA-256: 0c31c0ab00078adf77c08e480551a5c136a9ec6e36a7648a8e22882363befbc1
font_01_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 10304 bytes
SHA-256: 09aa144b9b333ce7ec0f5e4010dfcce0c6b507166cb1684d7095aafe9f511f6c
font_02_sfnt_off00014020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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