Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bd3e042095ef8d…

MALICIOUS

PDF

91.1 KB Created: 2021-09-13 16:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 62d18f6ac608f747e9ddec535670d8a8 SHA-1: b710434ed76e67515a6a079c9ca0f6ffaffca24a SHA-256: e4bd3e042095ef8d0b20b7132b57aa9263ad01eeef7eb8720537a79dd69daa73
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users to potentially harmful sites. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests this is an advance-fee fraud, likely using the embedded JavaScript to facilitate the redirection or further payload delivery. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=secret+lotto+numbers PDF link annotation
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///nobefokud.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/45429468454.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/89515703105.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74253481120.pdfIn PDF document text
    • http://marymo.ru/uploads/files/lodivupalapomixirex.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/muwewavadivajekepukire.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/1070492258.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/sugixuronumolo.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131705b2e4b7---5436741067.pdfIn PDF document text
    • https://songhong.info/userfiles/file/xozujujasilofeli.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/tapejuvip.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/1022103416.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/40891745260.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/bijegobitipegujuso.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/borixopuzutaruwezeni.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/64840006792.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/30845753592.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/sokijepidaranivinumi.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/baxubunugazabizetafeva.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210910163124810386.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/bivat.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d27e678f3---19343205297.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/wuwijanitovitujenofowuv.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/luwinakizugemejus.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/getiwosovivamowokobidu.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/88776047437.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_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 19128 bytes
SHA-256: cc79bd547ac41a560057096da3e58b38d3c2e83792884ea52861772ee13e9d68
font_01_sfnt_off00012ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E9 10452 bytes
SHA-256: 60790ef1aa9cabfb2ff9ecb79374c1fb7ef8b442b46b91efd38ae6a1f1082411