Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5063e2738e438d1…

MALICIOUS

PDF

79.4 KB Created: 2021-09-17 10:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7c5299353bc4d417a8e30b3ffaa4c66d SHA-1: e1b77fd8a9f601d8a948487c2a8f007b2b921c23 SHA-256: d5063e2738e438d110046bc050acee0d83d0d7b23e4940c5dfa16d1c3c7f92cf
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a fake browser extension or plugin. While no scripts were directly extracted, the presence of numerous unknown URLs suggests a phishing or malware distribution attempt, likely involving a second-stage download. The document's structure and embedded links point towards a social engineering tactic to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63298498934.pdf In PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/dofusanagirawe.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380cf23f949---ruxifigofav.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/jokajoroxuxanip.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/lalopevegawabinuse.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-6/20210906125225779664.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0e2b8a3588e1c8eb0bf1925e0c35cf74/kenizuvelazikizamep.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/84551301405.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/63281460441.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614042c62c17f---kimarowofodolewawanijo.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/siteletele.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2c8820432e66273c9c6e7a98161f9488/86809349877.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/41047895135.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/zibegokigarerume.pdfIn PDF document text
    • http://besteva.com/upload/files/juxirifasezo.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gelenobovonez.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/43126573731.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/3167981885.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4144d3bb0---24089581449.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/sopafexotobavi.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/70710204606.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/83540212324.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/ladisadujesirorunafemeka.pdfIn PDF document text
    • http://learningkey.org/userfiles/11332155426.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/fawenuzananoluxefebesaxi.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/benifekukuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=clone+android+to+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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 10104 bytes
SHA-256: edb50b6ec282eb01581ae90747a5643a86138d64d911a3dad3e11c3d3ceea7e5
font_01_sfnt_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 16840 bytes
SHA-256: 3576a3dfcb51ecf79b1f5d88712cfa04828836ee7126815a2d4798b775c78552
font_02_sfnt_off00011785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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