Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea2747a96048977…

MALICIOUS

PDF

85.2 KB Created: 2021-09-18 13:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3bc83ea45db4d71c29c0fd6e85d7ad7e SHA-1: 554993ceb2f6aea96f2953e435002778f49aa4f8 SHA-256: 3ea2747a96048977badd6d3ad583c4cd50365bc2f289f178b7ac7a28a073e76e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple websites, some of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://medvor.ru/uplcv?utm_term=best+offline+navigation+for+android+tablet PDF link annotation
    • http://studiotecnicoligioni.com/userfiles/files/54034805558.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/70qir4f0kvbsjca7qb1akfra8r/31614981173.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/88701456969.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/lpqjmabmukqgbo4ai36nacc613/29754606127.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631496037.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/71227258505.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/wopesewovak.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/jikotawipetipazuv.pdfIn PDF document text
    • http://poorclarescork.ie/images/maxixuzefumoximafa.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/baresokejitabatefuduxa.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/nojib.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021091021032374.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/30993218744.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/a346526329f7a085bbe2301ebae3df57/lomejaxevitifagekazomaxad.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/64009393470.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/18029832284.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/pexeforepuremip.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/jumigikotekagi.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/kezuju.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/93771780583.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/75581aaa6312aa877e722740dbfe9dd0/bewabigotexoxij.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/55385064549.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/weripitujolabab.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfd735453f---9466753152.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/fujefixetakiboxasu.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/legokawafuzedomo.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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 17804 bytes
SHA-256: c3b88cdf5b368b6bd2994fab65c2277e3eba996e0ff2b2b0f1e839eaca3bdd90
font_01_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 10788 bytes
SHA-256: 8e242c031f658afc80799efe9a4343831864806f2f6e5e2d4fcca013d6ef1331

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