Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68f912e9fdaa721…

MALICIOUS

PDF

74.6 KB Created: 2021-09-19 16:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 40c3a023831d83cb303f6a742c0a6e7b SHA-1: 381ae5d720e5b9d5753242810cdd10aa6dafb491 SHA-256: f68f912e9fdaa7212aff96f69640b383bf8f1f22c5537c671707db55b14ccb59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=xender+old+version PDF link annotation
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/xebufenumalefozonurulak.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/87988613654.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210908230048.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/furipov.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/bulanatipoboledoro.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/42146351243.pdfIn PDF document text
    • https://pmms-online.com/assets/file/gufolifiti.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/kitapuwikegono.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/98498922822.pdfIn PDF document text
    • http://maytinhnangdong.com/files/uploads/editor/files/34435673319.pdfIn PDF document text
    • http://skncn.com/u/files/lagoxujerulo.pdfIn PDF document text
    • https://nppgursaraijhansi.in/ckfinder/userfiles/files/firoragagutegipikebobesi.pdfIn PDF document text
    • http://ridendo.cz/files/file/69206620830.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/86184561793.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/buvoladatisu.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/tuxipurezufane.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/77382748358.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/wonumumefijakazugo.pdfIn PDF document text
    • https://salonrewards.ca/images/file/34664801245.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/41160524145.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/60146003565.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/16613497671.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/40213133253.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/rupexojagu.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/kadivaviwoke.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_off0000c329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC329 10056 bytes
SHA-256: 514464c49bd10f0d1e0240f928d7a68cb17d7ce8493268d2413298c5b9eecc70
font_01_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 16528 bytes
SHA-256: 7e0c5accb7f017bf26bcbe830ae39bf9489e964ea432275c3bdc4bf99194d6f2

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