Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b26989d560807…

MALICIOUS

PDF

80.5 KB Created: 2021-08-02 02:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 87100d2137450c849e8c5700fe6ec15b SHA-1: 124409ffcbf3c07b53ce614cf73f8d81c413a62d SHA-256: eb1b26989d5608073f9f109b248eeb96b61314b5f03d5c0a219a3c864157e426
156 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 WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://inwebjor.ru/uplcv?utm_term=2004+toyota+matrix+stereo+wiring+diagram PDF link annotation
    • https://dm288.com/slicice/file/97733221223.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/83023172882.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/e838a5802c2a0dbaabe25dd77f9b26d8/12814783871.pdfIn PDF document text
    • http://abnicum.com/files/file/wapowutigotixaroroxire.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/05bf05567018634ef8a075c02674916f/mobuvugetejiko.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8dd02b1fbf15648cc65d7ce92f298bc9/81917495662.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071712510573499.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/lnl5vt1hsm6rjohp4fn7eoinp3/nepirinilikuzuxorarimofel.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/d9770ebf7d4bc3be5b02e61df680582a/97242772484.pdfIn PDF document text
    • https://qnzar.com/files/47091012147.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f2290b915---86836026341.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079d43762ffb---fupozevuze.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/71588553253.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/fokaguzadupubufiju.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a95a88ceae---20745599454.pdfIn PDF document text
    • https://dptech.vn/uploads/files/197013162.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/voposarajidogibuze.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/6837755238.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/23466773963.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e16d8b4d1ef5113a5a1ba39be949ad96/13835238929.pdfIn PDF document text
    • https://aaaxxion.info/images/file/sefipudazig.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/78775091083.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/34928067632.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/d147fe362f7e5f9172f1277c7c2862ac/neseberasulape.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/jemisinulosifevokewuzob.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/6bb99c92d43830b5a94bacacfe754527/lokexepilid.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/62128528699.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_off0000d522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD522 16440 bytes
SHA-256: 1df00362c2ca53ddb79b84dc44b4979ec897c878c34a561ef175d33f7a828d52
font_01_sfnt_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F5 11068 bytes
SHA-256: 71b3cb83871113f8f7b05aca99096e0eeda564741a8ca7d31a1685724682a5e4

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