Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ae9becd28f73b4…

MALICIOUS

PDF

74.4 KB Created: 2021-07-18 09:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7d618e0e337f29e4ae588962fd9ef202 SHA-1: 1522e488538b522de6e295a653456fc70b958bfa SHA-256: 48ae9becd28f73b437d4c76dad5211e529d26c93f1d8d5b6e268ffc396b9dc14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, which is a common tactic for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://smartcevent.com/clients/871459/File/dotanubafig.pdf In PDF document text
    • http://grimastone.ru/files/57459257654.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/97374463030.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74821892365.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/zakazotaxajuzopolazegi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9d1ec53c---norufudewol.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/pbbho09qn1vsod9pgvev3pdc31/60411170581.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7ba8c16a2---tiledugosijesasuxuxiw.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/27825465784.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/13ebd95c3c36c06bb518b319f4fc42c1/noragelumanelozelavuvag.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/5d8c208dc2b1f35203c1f10c3bc59223/pidavomamatilofix.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/7164814543.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/sumejabudovenavizarolusos.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/desotaxenadesa.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3f42325ff212de0b54e22080826ec8ee/mimisakuli.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/24001345034.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/v580u4rcvii51820tkhhceluv4/bulakatajibesubisuseloseg.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/52f6ceb1e33082f34c627947a7f188a9/netuniji.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f6676d036---56146661175.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///6461440743.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaaac45082---fidolune.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/3dckmloepi78fklms5p1lo6fh8/82342811382.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/sikajajiridu.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/pudijidopabinoxib.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/pivezawofuvoxowunema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=accounting+teachers+guide+grade+12+new+syllabusPDF 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_off0000bbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FE 16824 bytes
SHA-256: c642a05d3570d139bb5ba16235ee75ea37b1fd11313ae6f8e87d42258e35a6c1
font_02_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 11244 bytes
SHA-256: cf3d1751565976bd12adc7a9149b1a2a6a8cc3edbdeba5f5f24270117ad4cd42