Malicious PDF — malware analysis report

Static analysis result for SHA-256 2582e00c3f6b19ad…

MALICIOUS

PDF

91.1 KB Created: 2021-07-02 12:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ab066b0f986042bd02586c68654706f SHA-1: 7a0f9cf0c2f7084d7c024d38d1d6cc6d8e5dde92 SHA-256: 2582e00c3f6b19ad8c7960e4cb0a583649b4c581f07269032e47132d9e5c5f03
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary attack pattern involves luring users to click on these links, potentially leading to further compromise or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://perlawarmii.pl/userfiles/file/86832947897.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e63cd3aa18737c783fa0dc1c50fd9472/59851886805.pdf
    • http://superplasticizer.cn/d/files/89538905824.pdf
    • https://nanyangtextile.com/userfiles/file/vamiforaxepevola.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a9c0d671d---22845549128.pdf
    • https://hostmegasoft.com/calisma2/files/uploads/4726260557.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4705f816ab---29354258250.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/ebb94b67560973741e3b5441e4413c5a/lutujavuzesevurakanud.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/buwibipuni.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607669e4dac9c---38406463880.pdf
    • https://briljant-maleri.se/UserFiles/files/wisitowabimawagafupatul.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8f6143509ecfdf9bf25930e719a4836b/mebawirixoxeji.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/q3k1vu2d82reiehetk5bjo85pg/fifetokoladimosemejonedok.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/acf0929fcc1d6247627698781371a4e4/85153856640.pdf
    • https://festival.bg/fckeditorfiles/file/tokujesifesabewabikis.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/de4052ed8d2e39f26badaf18a2ac7945/fiked.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607635ef11622---jininirav.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/f6b2c866ed156ecd4ab8487e50673e0d/muxotifusedop.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/2d2fcec931099016481c5d5f821deef3/zobokel.pdf
    • http://one9five.com/userfiles/files/73783184470.pdf
    • https://ratsimae.ee/media/contents/file/zefakulufejigegagok.pdf
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/65960932731.pdf
    • http://beiwendq.com/userfiles/file/luzudomixeki.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff12906a63---lajujosufewalenuzasonig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=itchy+welts+on+thighs
    • 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_off0000ffd5.bin
f414d34d418b196ecf40d9a65e7e7b72d80a330cb91e51286763898f491764b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 10396 bytes
font_01_sfnt_off0001176b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 16792 bytes
font_02_sfnt_off00012f7d.bin
9c5dab7cb2f41fa91e36d223a5f08fd9ea5f95c259474a77eba6dc9f823b6134
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7D 18132 bytes