Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f7b6fd5c94f0ab…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 09:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 701918858a46a686022e38401b7e5dfd SHA-1: c029ec5b75816da4d4bd6e73c1b2bab853cdf6ca SHA-256: 49f7b6fd5c94f0abf439be746b7152a0699d49eb3315f87906f43424e7fd8adf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and embedded links indicate an attempt to exploit users through deceptive content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://kopdesign.nl/userfiles/file/63156067925.pdf In PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/rurq32qh133ihqrdevsurj79s7/bovusakupinuxutefiruvaken.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f80d5756510---vusegomudixugupudebopepo.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/lavilofek.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c062fac918---48450961702.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e1725087eef98d67537135606dc03bee/jetixug.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/xolev.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/52115724095.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/61740309357.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210808_CC26B0186D6C5FDD.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fb1b39736761a5140f9ef2a468d3b10d/zamibazakajefipa.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071adc28ae3d---8405837869.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/xirobezigulodegavujasaseg.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e0f10a2ee---95262335264.pdfIn PDF document text
    • http://zerosquareonline.com/file/3660907105.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/59088182514.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ji5cqo91ba50f59jcgeggqkdt2/94563189271.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/kapifekebubozivid.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4ce66ea15---62580769654.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/rebezoto.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/gobapamiz.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/dff7d51b509eee84b457fcc8d85a0248/texinijavukutigigiguruv.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/54a482aa64d0c107d89fc1c6c2d16755/menug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=lesson+histologia+pdf+gratisPDF 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_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 18960 bytes
SHA-256: 5783200274c385be2c91fc114679464f389eb744dadc785961fdc55c07e365df
font_01_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 10732 bytes
SHA-256: b43461ffef33540b763906432abfb7c4eb6ed3e19c935a93cb13449f7ab7d6b5
font_02_sfnt_off00012412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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