Malicious PDF — malware analysis report

Static analysis result for SHA-256 360e848cef5de836…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 03:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6592a08b7d1833fec310b36786f927c7 SHA-1: 7372b7388092a8deed96238e976f91173423d891 SHA-256: 360e848cef5de83663bb81cfe9e68b8d5c6cae9692f363c7a3949480f4e6d34b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs pointing to domains that appear to be part of a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=i+am+a+5+letter+word PDF link annotation
    • http://konditsionery-odincovo.ru/upload_picture/file/45995597287.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/kuzeresal.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/radimikozupirezafuka.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/pigor.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/15239361854.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/bulesuw.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/28768703930.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///19526042079.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/47516510588.pdfIn PDF document text
    • http://steinemann-ag.ru/40895018054.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/tuwurufupimozejir.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/sonafujeg.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/latujejaw.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/71493618972.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/memasuwube.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/53220114435.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/pazezasotosu.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/45850070780.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/wexuretudimijelakod.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/faxizufawesevuzoripepa.pdfIn PDF document text
    • http://samtle.net/ckupload/files/dijizovuredezajakut.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/rofupipepojaso.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/53028379657.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_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 10216 bytes
SHA-256: f0901d56bc00253a3cee5d8be6a5dc7ff0f56302f06df75382f1525584ae4b27
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 17748 bytes
SHA-256: 5438f1ecde01322f2277a61453a22685517f6d953e37909fae339187c3c8423b
font_02_sfnt_off00012040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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