Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d3425075b0786f…

MALICIOUS

PDF

65.1 KB Created: 2021-09-30 17:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 880a49469e427a35f3196992320bbc0e SHA-1: fb29db92a659f5904dbe4f52060803531191f38e SHA-256: d6d3425075b0786f95513259985076e1ea99b3c23d390ef728790b9eed51a29b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6424

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
  • 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
  • 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://germainelecocq.it/userfiles/files/4335466590.pdf In PDF document text
    • http://sibinetweek.ru/userfiles/file/11059246356.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/zevelasuxalikagulokuk.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/xeledisidu.pdfIn PDF document text
    • http://lagrupacio.cat/file/gezofepubedigapox.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/53041580061.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219302130312090.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/zevixazegufalugabu.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/fazimavuvu.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/50475390547.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16141136ebbb04---33367203746.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/2246012095.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/82615462033.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161534b5db3b14---12648528004.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/35148093756.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/93223664064.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/98064095100.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/64044007318.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/pomefalemisire.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/vurujavixejolonuxasum.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/juguniwenebarukuj.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142b339a8415---30053144899.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/81940575663.pdfIn PDF document text
    • https://siroyensao.com/upload/files/6963775872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=attack+on+titan+tribute+game+browserPDF link annotation
    • 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_off0000af05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF05 15372 bytes
SHA-256: 774d4c3bb8c8bf02697f85d77d349096997e878c1b544ce93fe18a00c4180d28
font_01_sfnt_off0000d5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B1 10928 bytes
SHA-256: 22dc5926792c9677866dcab617354966695aa482c5b75c74e469d3625fab1173
font_02_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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