Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ebda09777831ac…

MALICIOUS

PDF

79.8 KB Created: 2021-09-16 17:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7ebac6f1cc445a0f93c8cd11b10ce71f SHA-1: a09354e7436c8fbdbcf28d93e042fad5ffa4c26b SHA-256: d2ebda09777831acb57e29d1a09f903ae6f56a12ed7b28fd4250c6b50c2bc3da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of external URI links and link farm indicators strongly supports a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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=how+to+change+battery+style+on+android PDF link annotation
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321a3b2bedf---46970700750.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/6077967026.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/232e32e719d40f68185d211d3120e705/18151633397.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613569ff7743d---xaleworozaruzajije.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f87686920c---94119453036.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630721152.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/76569923830.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/65738872752.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/83888811466.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/wotesejibapesasesojefu.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/70026724609.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/62951251513.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210911080325.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/80212715265.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/20619121008.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/patewari.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/palegilivadakabalute.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/damepovobagebava.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/61985084480.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/65678655731.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/wifejitepopi.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/31779648554.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/20717324219.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_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 10980 bytes
SHA-256: 3a4fe2a5b5bf740d8b64e8eafd84ae1c6fb502fc8bdde1c33fc90b2d2e41185b
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 18128 bytes
SHA-256: 74c693516382d38a496bd49b42411535f327ed864091b84e7b7f22fc73436dc6

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