Malicious PDF — malware analysis report

Static analysis result for SHA-256 84197a5667eb9276…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 14:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 57138acccd64e733f84cba8c34dc94ca SHA-1: 15e045ad8746bbc34a51b1a6a6f126a36112f7df SHA-256: 84197a5667eb92764cbe50e836a241c22b914c4882ea43e11957aa96d6401ab3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to one of the numerous malicious URLs found in the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://garglob.ru/uplcv?utm_term=streaming+film+the+handmaiden PDF link annotation
    • http://dyneco.kr/userData/board/file/bifol.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/8659082016.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/89734057573.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/7488632324.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/musegabedidufo.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/5273940689.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/wamirarumugaz.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/52177789917.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/25764347107.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/jozokuwigirupamudedotape.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/takizodezanijoj.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/27789464843.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/xobigijofawodojesezo.pdfIn PDF document text
    • https://airbays.com/userfiles/file/valesejome.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/sugojukatisefil.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/vexowosagakovugipu.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/11074414459.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/91974934090.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/59148801737.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/85746567362.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/43491488297.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/53138887398.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/joxebuwazabujixoxib.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/jomonigizimemisu.pdfIn PDF document text
    • http://sungder.com/upload/dazifaxomorebuketef.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/kelukupuwalazasuja.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/tolezezak.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_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 18544 bytes
SHA-256: bee02480fc993dd346f9f1f6d58ba7dff8ed8f3becfa0741ca897b01282a6e37
font_02_sfnt_off0001199d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199D 10588 bytes
SHA-256: 6b94023434ed193cb9eda0ccbed368704cc38daba1984562793d0ac11e402610