Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43fd3f41530c37d…

MALICIOUS

PDF

84.7 KB Created: 2021-07-01 22:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07b55ef7f742a2a2ed5428c45f106840 SHA-1: 5785a2afc0a2f3c15dec621719edc9343688bdd0 SHA-256: a43fd3f41530c37d8ad7db3d243233d849ff22b1bbacf362fba106758a747418
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the overall structure indicate an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/5p3t9t1d3nt6n4qe3nc5kin1th/fepalekinejiboritapi.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a498b5dc7bbb93110440d5cd27a3864f/pujovikebiliboxu.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/xikon.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081254e6a826---zimem.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e1feb8a62---xuruxav.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607be473b22d9---29041450445.pdf
    • http://aire-limpio.com/img/editor/file/melajukedefatarubiw.pdf
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/wanibofilox.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/rozemoti.pdf
    • http://afghansolar.com/userfiles/file/saweju.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/kaxodijozog.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075708d14610---nelokup.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/89e5fddb4a878dd51e3162e10c243525/7648792001.pdf
    • http://roocenter.ru/upload/file/dikufopiv.pdf
    • https://fasaac.org/temp//files/gabivomuru.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/cbb23e21f80f105fb5e5babca71fe68a/sexoxunesidoxoli.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c07b408c205c414215c952724b65628b/tisubinukadisa.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/t19vcgl12a6sekt5kapmvc94p0/nusidogonikawepiwalipux.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608688318aeb2---vebewigitog.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaa1a0c4aa---11961477447.pdf
    • http://stolizstekla.ru/userfiles/file/30833326906.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed918b9502---gefewefabinubul.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/3ufgsd4b04i4ane3ej5cnklm0t/46155765253.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e55fad75d8a71b6514f0afd8cd8d2e2b/38527091911.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9084c57412---4247007761.pdf
    • http://amphorabeautyclub.com/campannas/file/67366972328.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c50af27dcf---4882926569.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=do+i+need+to+endorse+a+check+for+atm+deposit
    • 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_off0000e997.bin
15f5275547885e5a452ac851ce75486f8f1a76f1c4d9ad059e7887570332ef4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 10932 bytes
font_01_sfnt_off000102c1.bin
c92e6d13d6c4ef614154a25fb9ce8e3525fb5cf1273325993c03871c1017373a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 16452 bytes
font_02_sfnt_off00012d4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.