Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9942f361de70a1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 13:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f1713b1f9c07dce29ee47322117aeda2 SHA-1: fbf1a6e00302e53c0d4e76d9f151f5b58f267917 SHA-256: 3e9942f361de70a1ca7e858a41d5af43758c622c3d80801c3d1d1937e2aff28c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely for phishing or malware distribution. The heuristics indicate a pattern of link farming on disposable hosting and compromised CMS uploads, suggesting a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wastran.ru/uplcv?utm_term=can+a+retired+person+cosign+a+car+loan PDF link annotation
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/570bc38ad626bb510fa6d72ca4f42220/88964190051.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160797496a5317---pubare.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/kupirexuxetewirilobiz.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/58870911028.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c043ea49685---tavolugawufubakunipexev.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/gq9k5gb8e8vgibbb4j15if30b1/35372308243.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/56174040799.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/20126199974.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715d8bd1746---20763216676.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160742d58a23c3---28634927819.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c7962c1b9f1---95112794110.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/cs22j71u3hkbsep0ic8qd8lf43/18400564907.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/889729c42806ede0af6c3d0485ddd09e/pudovofivab.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/62592245624.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/548982193.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/wirogavafajisulasifezoxox.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/manaxez.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a4c8f2250c9---83210188185.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/8261478516.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/46112173041.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/d23ef92820e1a9f40a8a4b9dae290385/39858640969.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bdd1e322b---21302459026.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/vivumepirewalut.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_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 10720 bytes
SHA-256: 4d0591e0039ba55672f29d9383bb2f396a61b46424804fb3f2e56d9a158d05fa
font_01_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EF 16680 bytes
SHA-256: cb9f56542a423fd6babc3960ac3cbd28696ea9b7b0f2e23d7e220f4b3eabcc7f

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