Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff29411a02935f9…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 23:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b90380b0e1e87254efd4d25f4209afa0 SHA-1: 39ac0f9166b5e2518a08da23e9662199ca48f83a SHA-256: 8ff29411a02935f9c61463b5e687db71a17c9f1fe2784feb8e568145f711247d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • 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://allytemp.ru/uplcv?utm_term=instagram+4.5+apk+download PDF link annotation
    • http://stilistspb.online/public/files/uploads/files/firemiwujeteta.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/84777504799.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/xivinupejoniziwapigimut.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/7736457417.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/sudaselotowej.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/84475331944.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/97500824873.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613494bc1267c---duwuli.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/41029564914.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/6938427335.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/tuliropujulitarobigabe.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/97193446567.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613942e8c4648---wevav.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/wupaxonepiwa.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/tidagiwimozutezosatid.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/48798762751.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614164a3307ac---53822669064.pdfIn PDF document text
    • http://arucax.am/user_images/file/53029996497.pdfIn PDF document text
    • http://daliangluyinpeng.com/userfiles/file/gafumanaxefedijixulotazil.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/kesatonufikoledosusetazer.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/56854762594.pdfIn PDF document text
    • http://mamam.by/upload/File/file/98097438655.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/53854112980.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/27432276752.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_off0000af35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC747 15436 bytes
SHA-256: 3ef50c392c44ba59c42895f92d8be43063db3faa6d005d46410cf7102a84873a
font_02_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 10916 bytes
SHA-256: 46837a30c5694b3efecf279fe3f3e39e038a2a370dd597e070208120f1f48ded

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