Malicious PDF — malware analysis report

Static analysis result for SHA-256 5658eafa811a07f6…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 02:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b322f27ff7e4202b3f908a54b3bc2a66 SHA-1: 5565c0b7f67794144a39f174f969e549b7555ab1 SHA-256: 5658eafa811a07f6c69adba4bd32a2ae019dc18aea4b0fbab9bd7e03450997c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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 https://xlspandoek.nl/userfiles/file/nipozawirisolalovudugi.pdf In PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/mevakig.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116a9283d7fb---zubemiduwivaworomawenaz.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/pakesurolulagotewexeserop.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/39080151406.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/3mc4ol50985oca7005c2fuqarp/67694992757.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/minali.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160945cbb55888---peliz.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/rokewikidanuxerodavep.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1e25e1556---zawubokadum.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb36ec9a7f---20013670058.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gpe8ifve5luc43og7k7otuc5m1/kurukowatazovoxotetaligo.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/5b6bb4dacdbbba6c50d38b9944a603b7/buwutifot.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/kovasetaxigi.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/48900897731.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/kufasafebetumojomopasarod.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/25f6564d607c43c09a783c342a16dedb/giviwinowebemidisu.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/vopisudiluxugidomesewiba.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/nokowidita.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072169e5c346---rovurodugukagozinemiwu.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/8559293474.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/7b2tqrj1jvde1t95sib39ar42o/serewijorulofowir.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9551dc7323---vezaladefutewotabufirovev.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ed4b9f6d03b14beecc316d9efd1fdd40/kexus.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/sajasuw.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae97da5697---rokekotonukenibewowuvurag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=reading+comprehension+worksheets+for+6th+grade+studentsPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/novob.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_off0000ce04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE616 15940 bytes
SHA-256: 6ce3e458090cf61c8177716a9b4057180ee1bef1210b637fe795c01ea07aa695
font_02_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 11512 bytes
SHA-256: 3e2a400160dafbb0ac7ef63e09ab54e3fcbb0f6a759d24c8dfabda98e65382f4

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