Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f48f951eacc1c9…

MALICIOUS

PDF

75.7 KB Created: 2021-09-06 07:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 113efc955e5d1cba2ea14799d5b2e54d SHA-1: e9ccfe7c482d469d910534acf7a95a87c1ec62d5 SHA-256: 83f48f951eacc1c9cb9a5c8576bc347bc92327dc60fe5ba40fc82ed57c8e2c49
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appear to be compromised WordPress sites hosting further PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users into downloading malware or phishing for credentials. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8q6ekarmtajvnn1lnht79rddd4/98889243965.pdf In PDF document text
    • http://www.toptehnik.si/images/31994204190.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/latigenowetixuf.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1ii7hdnfs7gc66u6gjultcepf0/pasopetizaduxiwo.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/3i2o6dm37kl9c73mh0bds79rc2/68065393081.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/xalepekazata.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d63deff086a---tilopapojajuwe.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d541776c8fd---3381117683.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/derenipakuse.pdfIn PDF document text
    • https://kawanmto.info/contents//files/39966685968.pdfIn PDF document text
    • https://renetravel.ro/images/files/53407515583.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/90705843708.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/gupuvusulifitunam.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a683b080f7a---83028432299.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/436e28d56dcbd63d1515b98caad4c3fe/puloruwejimonorij.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a6d8597056a0f7db05669819e2285c08/mepamutegogiveko.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f507b202aac110a27cbfeec40be45c2f/77695037392.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/4aea2cc6f625f7769613fbb4febced58/fevuxijor.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608212ce4b0d0---75587126930.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0abrj0h1ag8p86al2qi8bggmr4/kifafiwoweredalamuzuban.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f84fb7095d18dac3f3ddc0723cdb6731/furoduji.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/5677804330.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/jadelexunopiwotutilolinug.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/gigisudalo.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c64baf1759---tosikimoso.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/xepak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=convert+pdf+to+word+excel+powerpoint+publisher+and+morePDF 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_off0000c4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 16160 bytes
SHA-256: 7da103797e688eb2fcb42466efafc32fe6396fa4f3923455cff993fbfebf66e1
font_01_sfnt_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 11408 bytes
SHA-256: 801fef7f00ed20d3d6a4363f4e05e3e150072eee491af4b54fed828760c228e4
font_02_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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