Malicious PDF — malware analysis report

Static analysis result for SHA-256 00de6ce5b3118493…

MALICIOUS

PDF

87.3 KB Created: 2021-09-21 01:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b56898ffdf71c8603978e77b0a27b26e SHA-1: 4306486c1824a41f97d26b07ed023c422f4668de SHA-256: 00de6ce5b311849321e96938df6bc674e2206d9628ad13e9a92615a8286afa0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially compromised or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to redirect users to malicious sites, often involving JavaScript for obfuscation or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 https://777mto.info/contents/files/tewiwowujukibujezokurog.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0c3vvi7ee9f78far12irb6ete6/78877291438.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/74482722366.pdfIn PDF document text
    • http://findusafranchise.com/files/files/guruw.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/juzopu.pdfIn PDF document text
    • https://cartolmania.it/file/libiwos.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/wekuposagufojorubifi.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/93999253072.pdfIn PDF document text
    • http://trivio.it/userfiles/files/84042306639.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16130ac91eed3f---89124293276.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/boxugowiduzofujabedoro.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca687a799---65139714122.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/11193237039.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613af67926dce---degagepem.pdfIn PDF document text
    • https://tigapilar.com/upload/files/44091680171.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/26524095299.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/joxebu.pdfIn PDF document text
    • http://chinahongji.com/d/files/60112686977.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/liponevuvakujigu.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/venanavizofudav.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/75653439729.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/49561321539.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/70735560636.pdfIn PDF document text
    • https://baglab.pl/galeria/file/fagosuterobagukepunaxemo.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/92618341213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=oedipus+the+king+robert+fagles+pdfPDF 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
stream_004_off00011dc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11DC1 11136 bytes
SHA-256: 483aba8d9b21f7374be58627c18f063789c74bfd7507ee76319634a3fcffd604
font_00_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 20396 bytes
SHA-256: ee94be7c4307f86beeadaf4543b652ec9956f1ad05d08c57d344e51b330af078
font_02_sfnt_off0001374b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1