Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30a4c28999317a7…

MALICIOUS

PDF

87.3 KB Created: 2021-09-18 12:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4878550192c59c4a002d7e8c35ded09d SHA-1: 6d98f24101bb4a03ccd7a4542d160afd46fc2984 SHA-256: e30a4c28999317a7d4d918575df770a249bedf38c7b4286e623701d9a015f7f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure suggests it's designed to lure users into clicking external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=how+to+turn+off+auto+brightness+android PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16143ce4982665---90840664430.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142dd5add20b---92920232769.pdfIn PDF document text
    • https://csn-alliance.com/data/files/75125892119.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/2f92d817346ee4df2fc7631a1dbf2788/mosifit.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614167b35d614---4939003221.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea690c7bd9---19910829877.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/vawitafegipo.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5d05a0387102fe03dc608818650abd63/28094945606.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/jafakazoliregimurawizakan.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134f20957ec0---90804093972.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/febibozelokesugodukixane.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/75039841387.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109140628335613.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/39166115169.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/64133089779.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/jepepekozu.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/85780779838.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130a04320bb5---38773906411.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/10618139826.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/dulirabudagamimuxa.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/sobupivumiz.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630756676.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e228b0bb0b---41273239578.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/v5ek272ugdvu6ors8f5dher6fr/11350569473.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_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 10904 bytes
SHA-256: dd645a21d5eb97a9b361af8546054256db0d5351558df98d3ea0c60a3514e75c
font_02_sfnt_off00011ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 18460 bytes
SHA-256: e0a8119574418b25ed1b0bbff37bf6d5565597eb1b9819b69549fa928de2291c

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