Malicious PDF — malware analysis report

Static analysis result for SHA-256 0232c7ef92d4ed7e…

MALICIOUS

PDF

68.3 KB Created: 2021-09-20 19:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5cdf72154d84ddc042280a2865d49d4 SHA-1: 66655d7c653e2f68b9590b3984effe5473c83ae7 SHA-256: 0232c7ef92d4ed7e073e7547f6b1a77a33a6709892618be79387f85cb9d4580c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as a phishing lure due to its image-only nature and small file size, typical of a screenshot designed to trick users. It contains numerous links, many pointing to compromised WordPress sites, which host further PDF files. This suggests a multi-stage phishing campaign where the initial PDF acts as a gateway to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ti0pkvn02cvht5n8k9te96mmd3/vitakutusafire.pdf
    • http://ganteltechnology.com/system/userfiles/file/piwizefika.pdf
    • https://eghamatyab.com/basefile/bainbookcom/files/rimoguzud.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a4be24310ccf152b1f8bf00d1f04cd94/safax.pdf
    • http://www.salac.cz/ckfinder/userfiles/files/suduvawinuviwazuboxu.pdf
    • https://anitt.in/ckfinder/userfiles/files/5072364519.pdf
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/17595018707.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613438a500291---kumikimatikenigakuwevijuk.pdf
    • http://sporteambiente.it/ckfinder/userfiles/files/91351706384.pdf
    • http://szsahsh.com/uploads/files/sodevalakawetakolu.pdf
    • https://073741256.com/uploads/files/202109081711154208.pdf
    • http://hycxchina.com/filespath/files/20210910011154.pdf
    • http://c-amc.com/upload/files/xofidemoluxidusisukazu.pdf
    • http://polaryachtmanufactory.com/res/wysiwyg/file/31889412413.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3ab282d1c1d52c7d6d28316c8da1af14/bakoruzovodepes.pdf
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kasutonuzepirepopadi.pdf
    • https://okazionche.com/files/59277974997.pdf
    • https://penmypoem.com/new/admin/uploadfiles/file/62420429056.pdf
    • https://thietkewebseo.com/webroot/img/files/27706200638.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/14530c35f028ae83c6fef91dcf64b5ac/55866967541.pdf
    • http://ipceurope.com/assets/file/86136666491.pdf
    • http://sk4education.com/ckfinder/userfiles/files/630334382.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+look+at+someone+private+instagram+account
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0C 16792 bytes
font_01_sfnt_off0000c723.bin
660de971d78b2318c73a678ab1b4030bc7949358124948496fd162a31ef7b195
pdf-font-stream PDF embedded font (sfnt) at offset 0xC723 11052 bytes
font_02_sfnt_off0000e0e1.bin
26ae29ca6d397c56ac9c0a239c0c01a2ae2a4aae8d85727774f1636edf7c6831
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 14068 bytes