Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2e6d302d994ae8…

MALICIOUS

PDF

72.9 KB Created: 2021-09-27 10:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1fd41b90cc48215500fbe74f60ff4d09 SHA-1: 69d3d06b65be2f17e8048cde27adfae713504086 SHA-256: 5d2e6d302d994ae87205b691505f8f083cc7a5d04e7cadaa5b2d1c64a73dad69
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the file functions as a link farm, directing users to external URLs, some of which are hosted on compromised CMS platforms or disposable domains. The presence of multiple embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://garglob.ru/uplcv?utm_term=bad+piggies+hack+infinite+items PDF link annotation
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/46988735289.pdfIn PDF document text
    • https://citytrafik.nu/images/file/69150586061.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/63272789386.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/jonovipepesogixipa.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/rifigevuwimojenanafalojiv.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/12919750857.pdfIn PDF document text
    • https://kaparatt.com/images/File/logiwarot.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210913041808.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/fugopijopogizuzemefepok.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/67607623317.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/25624571111.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/nomikizenuzuzibo.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/piwunedimivotubexerot.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0dd537c32---tupam.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/bumavujuganenofujuriko.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/xopifufivawexogofeto.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/vefiwuzekajuwigowivekix.pdfIn PDF document text
    • http://bionazorat.uznature.uz/userfiles/file/85666225754.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16133269fad450---faxitatov.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/359b8eeb7b2018891cc9778b884c27d7/zosopiset.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/11325066211.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/lemorunolapupagaluvom.pdfIn PDF document text
    • http://www.moyekolodin.com/files/zomafugedovo.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/1245114375.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_off0000b8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FA 17132 bytes
SHA-256: f2aa761e0ea25d1014d743d1388085254e4103e5b51cb99ca4f99fedc3f265c4
font_01_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10944 bytes
SHA-256: 1a2f2e81dfbdaab83727a533aa50333106e5edd6233480fac856a27b8d3e0fd3

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