Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10f396f6d6bf4a9…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 02:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 26ac00a510854d621b02a41278a95483 SHA-1: 24f2f680c1d69aeda84f01793d40892ecb534026 SHA-256: f10f396f6d6bf4a996146d225eeb5b0d18414489aadbfbebd2dcbe09ee4ead63
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The PDF structure and embedded links are consistent with a phishing lure, aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://queure.ru/uplcv?utm_term=11+general+orders+army+pdf PDF link annotation
    • http://halaljones.com/uploads/files/kenazotij.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bb8958320---37096892320.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/86992927407.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16133e9702fbf2---setikusipogev.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/tedepivavozo.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/31dgm48q4fs4bsvb2qdpij7u09/setodexidizodabidorudoxe.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a413457325f---kokijadelilan.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/zebaxejigixores.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/dapugosavajatepokezipoku.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/jusoserumafeguj.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7f81135c04da9e53dec86140adf63d2c/vewizaguvotuzot.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/xodemokavilon.pdfIn PDF document text
    • http://cartopack.be/Images/file/89570493627.pdfIn PDF document text
    • https://maclashoes.it/file/99121208538.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/74400496588.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/43346726266.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16108f4cee3320---riruvix.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/9bb540129e7ed4861c94580dcec7436c/kovubinosolesesupala.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4a46eb83e---74976519436.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/veduzorumag.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/1923883399.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c0fda9ad00---71374216150.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/63938377928.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_off0000d043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD043 19588 bytes
SHA-256: 17b14cddd7f67d6b92fde31fb63cd86cf9758b26270dc2844805e6d3f87c4f12
font_01_sfnt_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 10720 bytes
SHA-256: 89c93c1f19d15fd38eb22ce7cb71cb3152ea72ddf00ac71e4100d89d24bdcc36

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