Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9aa09181755111…

MALICIOUS

PDF

71.2 KB Created: 2021-09-30 21:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ba7898cd24367604eabe4759a5b1559e SHA-1: 21e30455b3a7a7ec185cd868c5ef6dd201f8345d SHA-256: db9aa09181755111228bfe54b06d41eea416e9d7a2c3032e7a10839efd8aae18
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, including compromised WordPress sites. The presence of 'utm_term' parameters suggests a phishing or spam campaign aimed at directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://garglob.ru/uplcv?utm_term=android+text+autocorrect PDF link annotation
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/tizula.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/befejejuloxogi.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/75875182109.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/8444417662.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/59646288503.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/worijevezobidebipe.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/weninobividuxutetitib.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/tiullmm78dmb99226u05r69u3k/48560737042.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/jegogeputivinubor.pdfIn PDF document text
    • http://obrazyramix.pl/userfiles/file/lilawodepo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149b625bf83b---64449329120.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/nufido.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c47765f4c---difolakivopitolidudi.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/misewigemupejifaduvaxam.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/95268168918.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/39064214338.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614ee7fca0ddb---zunozixupex.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/8921657138.pdfIn PDF document text
    • http://protok.pro/upload/files/33005592494.pdfIn PDF document text
    • http://montesantangelo.it/files/files/24145488542.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/35871296058.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/kafogevekoraga.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/nijulufasunivaloru.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16133904c37233---72299664424.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3cafab874bb0db7e57d43da17709028a/84792566262.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/zizufevowifadajejigeke.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/77783135320.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/20009877973.pdfIn PDF document text
    • 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_off0000b7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE7 10332 bytes
SHA-256: 80a5ca84bbc05e83a19ef69da777d867bdd14ba5256687fed7fa55528e08e27c
font_02_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 15456 bytes
SHA-256: 20e3d0971da063e47516b4f22cd2d55b34b83ccc252ae45e28e251ea5da726a1

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