Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3b75faf26f87c4…

MALICIOUS

PDF

71.4 KB Created: 2021-09-27 06:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed3c9a5d9ecaac2729da0fa29fe58959 SHA-1: 63149c8fad244110afa30155959b107899706668 SHA-256: 2e3b75faf26f87c45390e60fed0880982819117ec07a9c2cd6c9668247f926bf
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains multiple URLs that point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites for potential exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://80tner.friend-match.com/upload/files/66240377996.pdf In PDF document text
    • http://aaas.handyfriendship.com/upload/files/ruvulawofa.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/6679484009.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4a2j6g0o5prdjiur7ehcu4sj54/vowijurutugulovun.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/10349314525.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615108db49f85---22278980110.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/sasumoxopixebonov.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/losolavoxavizosiziwojidus.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/numugifadikim.pdfIn PDF document text
    • http://allasclub.com/campannas/file/limubuwakefiwubepek.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/keworawulirone.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/fefatix.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/49818721840.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/96675024568.pdfIn PDF document text
    • http://carbontuning.ru/file/xabowom.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/51659064023.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/59280513878.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/kaguninogolixokuwanokujej.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/19970782038.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/34012845235.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/zebejutinuwamovunazovuka.pdfIn PDF document text
    • https://sscs-uae.com/userfiles/files/11916537451.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/gerojazadeju.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614db4724eec9---64886424311.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/2109241654004863138ksal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=viewing+private+instagram+without+surveyPDF 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_off0000b494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAB 10988 bytes
SHA-256: a7102bf21dff7bd507b59af75c9c56efa1a90a1bb9c32f17166368b954f55684
font_02_sfnt_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 16388 bytes
SHA-256: f6eb17103d0ff02c020de717626a0fc31e9851e049ecd053575ced1a1d7f40d4