Malicious PDF — malware analysis report

Static analysis result for SHA-256 7014f2cdc8835fae…

MALICIOUS

PDF

72.7 KB Created: 2021-09-30 13:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 608f36b53b9fbaae180e0d13280a384e SHA-1: 2651c13385631c64d9f3226b5d746fb91b58db82 SHA-256: 7014f2cdc8835faeaa4c46cee73bf17c0846d633dd0a4ca74d8ddbe55557cdd2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of embedded JS suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://egc.ecrom.work/syo/files/nuzugozedafagufagid.pdf In PDF document text
    • http://polimak.pl/userfiles/file/godivitizepog.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/xadatuvuvoz.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/kibujibivagudusoju.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/getarutajinutorofev.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/45409103624.pdfIn PDF document text
    • http://519pf.com/userfiles/files/rebopajagonozeredum.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210930153305_443jcn.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/25561003782.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/23572217454.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/97239323152.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/88358205880.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/nuvofuvajudikeluzepavufi.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/67966317467.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/fipagesadodub.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/jisal.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/20480059028.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153ed5a318cf---88109270671.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210921035549.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/tonebexazevu.pdfIn PDF document text
    • https://mashura.co/userfiles/files/jisimipebotunan.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/18484899365.pdfIn PDF document text
    • https://ons-station.com/editor_upload/file/kewogebif.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/43030911216.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/23663499243.pdfIn PDF document text
    • https://intersat.lv/files/file/vonadivorivezevavotenup.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/57631917399.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/24446382846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=gta+online+cheats+pc+moneyPDF 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_off0000b820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB820 16760 bytes
SHA-256: 3378a5ccf6817b6d3c588e1c43fc087257e4d0949f6317b80bbc47da62ffc6ef
font_01_sfnt_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 10692 bytes
SHA-256: 4fd1b880e4ff544164222b40d7d9ed3500ef6afa4dbf17c8b9b813f171c7bd05
font_02_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1