Malicious PDF — malware analysis report

Static analysis result for SHA-256 d195565d415532ad…

MALICIOUS

PDF

89.1 KB Created: 2021-07-20 00:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f79128c71e6d1a07fee3254f5a6a59dd SHA-1: ecd981c5dd3a91cb8c7d32e462a1062a5dabf73c SHA-256: d195565d415532ad7ce8e6e6d54219c283ac618343a1a62d7fa8cc19bd2d86a5
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a Google feedproxy URL with a 'the_croods_2013_full_movie_free_download' term indicates a lure for potentially pirated content, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/15e7ad7f926c3cd65f03af6045839aa7/sunikedi.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608894fedfcc7---20527473374.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/59f8afcjbmem7bh2jdhm8rpp7k/65515595361.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/cqc85r4d0uhsvv96u0fqm7kh8r/sitawekugowo.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/v47034pi6mah777dr6fuqtuls2/61012000615.pdfIn PDF document text
    • http://laduses.nl/image/file/47973592592.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/tojokojozaw.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/65322f9fa67ab41a32cf6ac9a45ee5ef/fefivasodevogapuz.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985dc6a79ca---21793864854.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/1faddad6175c6f40c0c791dd61b77180/15717471972.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c1de3f50---64149182520.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/30849868361.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e8c0a95a0b1a030ebbfa0883a2fb3c57/xotegatixuwadifej.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c80e39eb5d---38437728455.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7d6bba437---59381966382.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/54378248614.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/15755122907.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06ea39a77---18156339136.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210617_5BCA63FA41B12EAF.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/04iut9b6kodthqeod8p85vth6a/62618943744.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/78jdmgqch0jdrsfjoc74muksq8/damoji.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/zabexugevijovumusuni.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/pujudezebepugeganonulelex.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4b456a035---matada.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/vokesiduzugopepijez.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/42560514983.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+croods+2013+full+movie+free+downloadPDF link annotation
    • 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_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5E 17124 bytes
SHA-256: 80fd7a8fec94320bb955196f10b531daa5101938427309cdcee7d44ea6c4391d
font_02_sfnt_off00013c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3E 11324 bytes
SHA-256: d999ce3aca488eced0a63542e770054b6605733838517f4574ec3cff79ffb1f3