Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbc9ff48be2b1d8…

MALICIOUS

PDF

85.5 KB Created: 2021-07-06 06:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b9e330c36e182f188ecf2bbffcf4422 SHA-1: ed1e30f486624ded4292a4597c9124e87206e9d3 SHA-256: 3dbc9ff48be2b1d83af0297b2c1586c47fe5a9a0bff78a03e4fefd6c9f829b2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://asremajazi.com/uploads/files/3100468248.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/8766fad9f3a55f20326fcd93ca36431d/jovidukofasitoje.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28288a0fb2---74180862818.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca44081a7---40727857982.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/180166821.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/j1jgnm1l2hqdu7ipclu2uvs1d4/68357351948.pdf
    • http://bakoca.hu/files/file/42116850898.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/32ot64ms6n5d36t4279j9u4pio/kigaxuwunemesopemomux.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/h4sj2isvohulnsg8gi8uagbvbu/nadegapugegutugefokuw.pdf
    • https://festival.bg/fckeditorfiles/file/64277795942.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-6-3/20210603212915678753.pdf
    • https://prtl.pl/userfiles/file/38200938703.pdf
    • http://innotec-industrie.be/userfiles/file/kakivetexi.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89527df6e---2128300492.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3607ca51d0---65319782721.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/p90cah372qbg54cad4ek9c046e/demof.pdf
    • http://tms-operation.com/upload/files/68218021414.pdf
    • https://mytopics.it/uploads/file/99627285807.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160843f9bbe304---32762733358.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/223d403ad5ae9327e40d4c94ae0d937b/kenave.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/bf2282260d6e377df5b8d141b400a1af/makabatepuzoteponexusezi.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/2c59c879faeeeb42ed16a3400551d4a5/zobolurus.pdf
    • https://badrivishal.com/media/35049729241.pdf
    • http://aitrans.cn/UploadFile/file/F1202107020237157027.pdf
    • http://wagnerfamilyreunion.com/clients/866685/File/38696106554.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sql+queries+practice+questions+with+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 16792 bytes
font_01_sfnt_off0000fffd.bin
deffa8e5877233ca941ab131f3ee27dbd8fa6717ed7137c14868ebf29a1913a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 17664 bytes
font_02_sfnt_off00012e82.bin
94ab24bd3d9b6f95b8c59dda49e6282e7178b277e1936f89c4ba3c847514fdfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 11124 bytes