Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd7c9b0443a14b1…

MALICIOUS

PDF

138.4 KB Created: 2021-07-08 08:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1890c62e02da8910e63fa6a615bd496 SHA-1: e8cbbd5786096067d8d6d34e1ecf2e11b9ad94e2 SHA-256: 2fd7c9b0443a14b1982200b7c4ddd605b9cf84c5aa1f1431a73aa01c726eea8f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress sites and disposable hosting, likely serving as a lure to download further malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c76e5e6c4---13002903594.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609227884e12b---15246355946.pdf
    • http://rauvuonsach.com/images/uploads/files/51688858483.pdf
    • http://compufoxmail.com/userfiles/file/93198829552.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f557971776---vamekojumegobaroxed.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac69ce9b85f---54379708544.pdf
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/38556275718.pdf
    • https://protectname.xyz/whoisprivacy/userfiles/files/zomesogozamokadawolim.pdf
    • http://iweldbot.com/ckfinder/pho/files/welajuxeg.pdf
    • http://www.flamanville-76.fr/upload/file/kasobejilujef.pdf
    • http://www.cerel.eu/images/wyswig_images/file/55879994078.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944cb9db95e---vuwalon.pdf
    • https://vegan-eshop.cz/data/file/metalumulerokivojoxenimum.pdf
    • https://tiemhoahaibara.com/data/dulieu/files/87180826287.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607751705f8fa---74650111914.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/77a94f9eb4ef45dee7aa8e44b1250699/55052618200.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/o4k1jeldpis9p7eed1o7pp6h22/bobeloweberasujadu.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/fb6bo6l41vtfjt860s0jdnm7hq/84410593724.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mdvluv0m7jrjkjhb3j13fha43k/66208334107.pdf
    • http://bukharageorgia.com/sites/default/files/file/33436789165.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a346828f163---losisakaluxexoxiferi.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/70a72d9aa896b33e4e1ec5394fa78ca5/tuloza.pdf
    • http://mckeoughfamilyreunion2021.com/clients/b/ba/baf9e6b347377fae0abe5a87436fc4cf/File/nekitovolizo.pdf
    • https://suthuytinh.com/app/webroot/uploads/files/87332825002.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=effective+java+2nd+edition+pdf+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a58d.bin
15a5df409e7f769e93b5d44fd913eebe85f5369957b985b051127421615c829e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A58D 18500 bytes
font_01_sfnt_off0001d64c.bin
4ead41c0a56d1cacd0d63aa5624e6f953a0d2d468f2df9959912955bf14a06af
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D64C 10732 bytes
font_02_sfnt_off0001ef1c.bin
8950ac4d6f6107e1fd3f2267258c4e1d766c6d6cc4ca66d4ce1b30c294aca4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF1C 5612 bytes
font_03_sfnt_off0002030e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2030E 16792 bytes