Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabb62dd3fb9411d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-19 00:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 72f7c6e1bc6e8955f8f41d540e97c170 SHA-1: 4d75ed296e2c19153171fd7457c090211c550082 SHA-256: eabb62dd3fb9411d934cb6d4044f6d3a29cbcd29a329ecbec799090042283c25
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://files.ibiza-ferien.de/file/nefobizefitosi.pdf In PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2928c2a1c---sixidinidukopati.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/vadazufiwebodemowut.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/10918017404.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141fa4f760c1---jaxig.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/nubononejoverokesevebunir.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/sutazujividafogipo.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16146535b3d679---20831315826.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/ledujejikajuxolurebegime.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/rexezebebenutiridutug.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/84548081808.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/unev4s3nsqh2ldc7ijt174vtl0/lafakikozetavudunux.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a94afbf520---54496926632.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/80547668775.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/xepemafusegazofiwomedu.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/36165988452.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/jedaveb.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/94164595224.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/68484322507.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/gijirufoxudigoso.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fbc21ee53.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141114387075---paropiwibamizoperiwod.pdfIn PDF document text
    • http://neuroxl.com/images/file/laleboxofilorijebubavolum.pdfIn PDF document text
    • http://arucax.am/user_images/file/niwoxedejelubirijol.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/67585784924.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=words+that+start+with+the+letter+lPDF 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_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 10320 bytes
SHA-256: 3247f016482d105e3d363d84eda2fa6ee49afa1bd129416ab54673369f6d7df5
font_01_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001016c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 17924 bytes
SHA-256: 43907df4edcfeacf79fed1f20298f219e90691b08103ea2e48134c7645c05ace

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