Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd0d4b3861adc62…

MALICIOUS

PDF

86.6 KB Created: 2021-09-17 22:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1f887c875cacd646d0ddf785d40d485d SHA-1: 631c2967d2ff069b457d47d15c3b8124b8b50972 SHA-256: 6dd0d4b3861adc62326be8b942efd0859c4e2daa49f11cbeb2fe602d31349251
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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=economic+times+apk PDF link annotation
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16141aefb17dd2---38898678188.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613431adb230a---71386614336.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/lorivexoli.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/66863341417.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeef776e06---jowoxinemipat.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/bodezozadiwewoxure.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e125cf17fad3fe4547a6a4f35a7d9a00/vowesol.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/90606968336.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/jemevagevebewaninovuwaxit.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/161320eb7b62ae---kikisusomifirukegilemi.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/verelaxonepuxawide.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/pakubatiwonavalapopow.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/bajilekalozufuwewuxigas.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9228902632.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/94587202940.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/kapiduwon.pdfIn PDF document text
    • http://195exim.com/datas/files/30612693866.pdfIn PDF document text
    • http://artediapharma.com/upload/files/rikofepekuwexazaviwisav.pdfIn PDF document text
    • https://aildf.in/userfiles/file/vatidix.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210905120146402.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210909003515.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/rirud.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/tubevefasidoriwixezivo.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/48798089061.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141421eccd50---xaduzetajopu.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/wuzanag.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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 10464 bytes
SHA-256: 3faa78cfddc041a10ede0a18bd5d89ad5e729e766ec9c2c149eace67e8af3a73
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 19960 bytes
SHA-256: 8009344e498998336c2daae1ea5184f11e73abcd6d7799829e4ddec42c67a679
font_02_sfnt_off000134a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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