Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b18ee13864f4cbd…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 20:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 562e0080611beaf50a5e6d97188d407b SHA-1: 60ddabd67315319db1b7562b234896da2cbfcf99 SHA-256: 5b18ee13864f4cbdca88cb4f237dc6c9f4c1f18974e9175b0c1bb41ec14cad4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. These links likely lead to further malicious content or phishing pages, aiming to deceive the user into visiting them.

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 http://dallard.fr/ressource/site-image/files/56495477730.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/hpo9va29arfnf44khtvmr13ktv/xobukaxiwugizupijuba.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/9108519659.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/legodadorozigijowoni.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/97978796286.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/5483621209.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/7811528415.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/41963689866.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132f4643fba2---79325946410.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/63947348966.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/47396609004.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/vurizowami.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/gevevinokilijupujarur.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/66265874795.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/71067884941.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d887a193e8---96127877772.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebba5c8b8a---87716925549.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412dcd22602---rapimud.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/devosakovir.pdfIn PDF document text
    • http://teakdeck.pl/files/file/nabuxujewirujagopileluw.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/60326328046.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/83287538890.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/79088723803.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/46546074297.pdfIn PDF document text
    • http://mrybalko.ru/files/giboxowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=call+of+duty+modern+warfare+2+mac+torrentPDF 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_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 17256 bytes
SHA-256: 7be9a63d5ef7e47b53f9d5ef61a834076789e9f5e11ef596042e6ba1faa49f13
font_01_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 10828 bytes
SHA-256: b470276e05564003b936fe3739eb593489992598143b41a621fed2a6429edeba
font_02_sfnt_off000123fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1