Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfda0145527e9c0…

MALICIOUS

PDF

81.2 KB Created: 2021-07-20 16:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 24023757bbe165824923ce32140fcc54 SHA-1: 493fd27536c42d5489db304c827c2489cbba2b95 SHA-256: 1dfda0145527e9c07fc551a0851780343b2d418d75ca8c265d1b36680342bab8
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/hsce84j091o49fbb9scnlgab95/38646805012.pdf In PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9e84e9fbf62ff480ef8a0d3ee4a42da2/mifofezosovasafogin.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/9db3875d33be5610d5b6feb703df242b/46583346649.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3099b00675c664057ace850d4fe292fb/rugusole.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/51pp83rbd4dlvlflepd5sjkmo0/37735015284.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/8411309108.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/bobukawuxijewupofuririj.pdfIn PDF document text
    • https://susta.vn/userfiles/file/82224182537.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/gupadipikazamobevawapo.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/gezetavelorijivom.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/drd8hd9r3uj5f3h7r30oij8u18/25824510376.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1c13cd27d---suxifulofegu.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/64968297104.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/zigarupavofete.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/e7dda1e3a5dc9b35d116dbdecd743869/93174402400.pdfIn PDF document text
    • http://mebco.ru/images/file/weputepapebotuvenorubewep.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b528a955c3---pisajatit.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a7d6bebe---917861212.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/80835104797.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/wuzudokotoxikug.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/wawamomeju.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/39244182902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=fun+family+trivia+questions+and+answersPDF 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_off0000d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD879 17476 bytes
SHA-256: 16fabf606dfe1b725fbb0601e12bb4d6ca52a2dcd7926e91b5895c187ee74f63
font_01_sfnt_off000105fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E14 11004 bytes
SHA-256: fdc14bd8698aca784c4bf0f3ab156e79557e5f94b0b5f7023d94f01b92208563

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