Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadec58fab6b95ce…

MALICIOUS

PDF

90.3 KB Created: 2021-08-06 02:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: bc5864c205d0a940824e040888deb192 SHA-1: 30e67ac6675ce6786990fb5e344572e315432c85 SHA-256: dadec58fab6b95ce9b1e15a1728940123d993b6229fbe523363f21adc2a01a3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://cructi.ru/uplcv?utm_term=how+to+get+free+texture+packs+for+minecraft PDF link annotation
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84e8b7923f---lowepaxijapipuweli.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/zedofasulogepovokikan.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1442c9b1bb---62389483483.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/41130482872.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/3476285129.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/kapobeb.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/73624a88970ae49f2b4500126958ab6b/91534199953.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/kpqcrnsened3kfofv3apo0gaf2/jetujelazagoziminar.pdfIn PDF document text
    • http://splogservice.ru/content/file/pafedoxev.pdfIn PDF document text
    • http://chayka-svg.ru/files/27465868507.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096660641bbc---zipugutisi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3df6648411---86658133461.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/506392fccf9dbe4b876ef9ea294f97e7/73263336129.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/c839c31b63623fb9b706fd318637e66a/waronatakuzifegunolafeje.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/29526146869.pdfIn PDF document text
    • http://allasclub.com/campannas/file/21874129206.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/29637945985.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/xafaduv.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609665b3a83b9---dajagefaxakirati.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/2cefd3c2438f43ee8c1ca8130708e871/33802331491.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/85752389366.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/64150422018.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/ginow.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 16892 bytes
SHA-256: c2c7ba3bd9c7da62798171eefc0657e214c27e4334bccd3089506c8ca7d7e30c
font_01_sfnt_off00012809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12809 11148 bytes
SHA-256: bb691c6fae1e61f5d11ce86135ba968752cb7ab27bf73f6079daf93db38110ec
font_02_sfnt_off00014234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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