Malicious PDF — malware analysis report

Static analysis result for SHA-256 8568b904ad34c755…

MALICIOUS

PDF

91.6 KB Created: 2021-08-11 00:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 945baf72bbbc9227381b4dae5026d4aa SHA-1: d35a654dde215fdbe58383652a23d1c155b00cff SHA-256: 8568b904ad34c755e5bda6e8936a795166b2ca6e84f52725c01522a7c0587e1e
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. Heuristics indicate it functions as a link farm, pointing to compromised WordPress upload storage and potentially disposable hosting. The embedded URLs suggest a lure related to 'pandemic ebt card' information, likely a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082c582ba39a---zidirebinatabitanike.pdf In PDF document text
    • http://geose.ru/userfiles/file/65820483467.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/gilifawetiwoxira.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/f9fd6dd6ff0d184080ff9bfb4096f45f/filojovewozawagop.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/wagukagujewudexozo.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/79965211007.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98f4a203f---46364648733.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ebf98b3e1b044f017084e12ec4a33dd2/31543914992.pdfIn PDF document text
    • https://medpressa.ru/files/file/tifokipelonavegevob.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/45744754131.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2854213f1b---tozuregesobe.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb85f8a7d5---88342973047.pdfIn PDF document text
    • http://charontrade.hu/data/file/15935076096.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35c064eea---wevuzogoz.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/zilituko.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/pelapudemimug.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/df392109e94dfade13ec2cb3e8e451bb/65599634227.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea1be21c6d---xiregutaliruzifi.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/8d2bb06eee3675d84d6faef72e300ff4/lipegiwaluzunamajod.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f77557b62---verep.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/fodefumazelibup.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/nebarimozewaneje.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce11d714db---71998180329.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/pesijulivekenibejuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+long+will+it+take+to+get+pandemic+ebt+cardPDF 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_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 16696 bytes
SHA-256: e240ded8ceb1c4a86669aeff82c3c0a9fc1c415f256806d80534581256c59f72
font_02_sfnt_off00014772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14772 10996 bytes
SHA-256: 1510d6fed4aa9ddab0e97c4d9650a04c83d5bc31664a7704509eb15a35586e4b