Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2a1ef46dff6c4b…

MALICIOUS

PDF

89.1 KB Created: 2021-09-01 14:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c4ca1c2eb905a4717ee58d286a2f341 SHA-1: ecc07d875a7f6b5017ea95494382b12e980ad29d SHA-256: bd2a1ef46dff6c4b4636edf4a95d542ab0cb3730ba440a62d16840062bfeb57a
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised websites, suggesting a phishing or malware distribution scheme. The presence of link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc22598e97b---82200501024.pdf In PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/zixisi.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2e5549a62---rarigaruluwiv.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/binokubidimuz.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c04e2a21790---xedoxiwe.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b8b8308b7---37013449367.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/wuremurazusi.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1833c6dbb4---felimod.pdfIn PDF document text
    • http://rajeshjshahani.com/clients/d/de/defaee86e9f1fedea086b53a5072ac2c/File/84515956812.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/xivelulurir.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/zigogumi.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/zoxigabujawojikilule.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/98048212130.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/56393248288.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/60afd7cd040953f4f1d696ea2209fe40/19842539648.pdfIn PDF document text
    • https://nevisnews.com/userfiles/94690994788.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/41883379171.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/pokavopabamakib.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/89154195121.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/93574622443.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/10530450693.pdfIn PDF document text
    • https://turbooto.vn/upload/files/selipowisozigafabatugo.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/da1024d106ec94c98a9ec87261b6fc58/69878292144.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/f4268824378c85132080dedb437eed1d/56913728569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=i+feel+guilty+for+my+mistakes+quotesPDF 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_off0000f432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF432 18308 bytes
SHA-256: cd66043ea3fd50bb386858cda9e003a2ab7aa01bc213e8fd5d9e429f0917dc93
font_01_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8B 10856 bytes
SHA-256: 362050f0152a0ce200447932116179c05b335aa1aab08c17eb4d67c4e8053d8f