Malicious PDF — malware analysis report

Static analysis result for SHA-256 8039ec3f029f39f3…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 23:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ba3e85bb8dc4068838ff73fc52b7943c SHA-1: bdacd08a627866d2d06965f7034d6334b718d419 SHA-256: 8039ec3f029f39f3bf7b264c9f41040477d673d1d5f86183833a9d2f5787d1fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161387b421dac9---zapibadojowabedape.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/69e028970b3c3293d4eab4c18cf65d64/xofakojisovelirunulewawe.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/soxuxaxeze.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/buwajilev.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/kaladiximu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/59561651406.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/fogalanogibosujawobulukam.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/94817771152.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/10/21094806501.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/teduruli.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210914182407.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/wekodojawupasijifaf.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/84591492028.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/87420841975.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/xavokaniwofutagu.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/gemorez.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/248bca0e26d0210d1a410a49d6e312d1/jesoji.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161408d6c8e16c---kutakolobopipeduruxupak.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/wuvigukodarigelimaviku.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/pojenolizu.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/xitunumawekuvakanafemi.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/gekijuromotafemonu.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/35385011032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=bahubali+2+tamil+movie+downloadPDF link annotation
    • http://irodori.kir.jp/files/file/97005557960.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_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 10812 bytes
SHA-256: e404d391ee3f3c73da42616b0bcdd4dd2bfd5517e2632834eef24e9b782a49b4
font_02_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 17476 bytes
SHA-256: b9645dbcb86765af8486b26f7f40239c46773c17272c017d01be6df933976e0e

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