Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fd28cd75ac9165…

MALICIOUS

PDF

89.8 KB Created: 2021-07-23 03:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7de71043c703eee515201de60abdc5c5 SHA-1: 8ccdc1fe613cb3907ac84f93fe1996ace87a9b78 SHA-256: 80fd28cd75ac91656d77970b24b446962f6bbb2171aab9f41c038cfc44f8f7af
164 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised websites, suggesting an attempt to host malicious content or phishing pages. The presence of a 'download button' lure further supports a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://schokozentrale.de/idata/jisatupekalagap.pdf In PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/18670639125.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/6970642121.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50751351640.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/oloid2fmicvo6cuuns69f3758e/risuporogafe.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce32a17b3---doxalijeg.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/rabowumemivubalirene.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16074ccebe653c---55227480705.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/12058267200.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/kokiwuvasolawe.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/21844262050.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bedbcb0b21---sutovuvenodivuxid.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6519523c41---83358632602.pdfIn PDF document text
    • http://duhochmis.com/files/uploaded/files/lawapigav.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/53888574375.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/vopiludalatabakemamamuzi.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/89379209013.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/61773905900.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/a68e071987519b6b5127f44bfc13a81c/maxizena.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/90925115273.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac463432e---71203818980.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/31060274869.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/60876604510.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/97b85f95bdeb73deb01a3348081dcd0b/75256076397.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16093b099b4435---71277387675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=class+10+s+chand+chemistry+pdfPDF 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_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 17720 bytes
SHA-256: 038b0e362af57c86da7483407cea9a75ae22f94a4dd5c833b66be41adb04b2e9
font_01_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 11084 bytes
SHA-256: 7b116d5e3771e4cadc4e14b57324468f2bcdd5815aaf3a72319980053de956c6
font_02_sfnt_off00013f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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