Malicious PDF — malware analysis report

Static analysis result for SHA-256 d034849d5fdb2606…

MALICIOUS

PDF

72.1 KB Created: 2021-09-30 20:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fd6c3ac8d022eeeea05d63a3c5efd7ec SHA-1: d75bdacf9f75e76ad7a88e898e061cf0da52ab69 SHA-256: d034849d5fdb26069b4e5aa079e6432d513aec3bf0c768be56b78d5616df5189
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to external resources, some of which are hosted on compromised or disposable domains. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious content.

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://mojahotels.com/ckfinder/userfiles/files/vavodewesifizexunanafiw.pdf In PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210902_045E2FCC16044DEF.pdfIn PDF document text
    • http://starma.pl/files/file/rupebola.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/konesaronubijelunura.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380c46abfa6---67976787387.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/mumuvimer.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/zirawa.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/xetaxidunixon.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372dfa29d4c---lexubisojatomipijav.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140027060112---96661221150.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/22ad2677ee8e1b15fb1d9914bad0d8f0/30701674153.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/letukalubadit.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/22203613710.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/34301835895.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1631238342_d4bea05fb5.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/58717736123.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1632302888.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/87586333098.pdfIn PDF document text
    • http://matrixpaint.com/ckfinder/userfiles/files/xinejosinexeditadej.pdfIn PDF document text
    • http://totoumi.jp/upload/file/belozijonezivojuxigonelu.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/15061155207.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/69506314260.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/mimubagimipev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=autocad+structural+detailing+tutorial+pdfPDF 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_off0000b544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB544 17252 bytes
SHA-256: 14c3e08fb283ba787ffc4d836c45502767e1e1f80dc28ca5a59ff0ac85702ba6
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 10876 bytes
SHA-256: 670e7cb1235e69d761ddbee863c4b28cc5a3f8f01d6bf924d2dce7690461615f
font_02_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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