Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd94765b3b94a4c2…

MALICIOUS

PDF

86.1 KB Created: 2021-07-05 03:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36ca13ecd1a536100bd8a16216860f8f SHA-1: 057589324199ffec5e7e134028bd4f468c02e956 SHA-256: cd94765b3b94a4c25a71912142ed11bd183f79aa2cd9712e11e33da2fee508b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

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://betenenergy.com/sites/default/files/file/somudojub.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b0caae3427c24f55807cdfe590ab3718/xoxaxumikebujoxi.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/k40qp8j6jqvga6cvm8233its81/xogujetijenegesetamexuruz.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f82788636a00349da2af07ccda51d65f/70959637490.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/snsl3jdo4efvujl90gq366sv38/bakebapemipejetur.pdf
    • http://win-sonic.com/kida2018/ck_imgs/files/27861771589.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/07cadf9fb908d179301cb3b56cc98ca2/wijexokewamunekera.pdf
    • https://chiuman-hk.com/images/file/25689291182.pdf
    • http://askort.pl/Upload/file/17366456990.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba6640191---bubodufapuwir.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074617123e73---37538748432.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/30174430005.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608351772d549---79299509917.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/igfg89q7p2lkuv5a4qodegn3s1/zujej.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608bff0a3097a---98505351690.pdf
    • https://cafepiolho.com/uploads/assets/95221999411.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75dd25b72d---zafiguxupaxopeto.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094bfe37607f---nesumotowovunaparevofa.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34d878b665---vivobaxepisezadeloven.pdf
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/34803682940.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/3c01i4itjutlecid2u1jsa31dq/mufefizebari.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b50c1bce93b---88970110362.pdf
    • http://autosoftware.company/autoresponders_images/files/42280375108.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+install+snaptube+on+pc
    • 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_off0000ef7c.bin
36e0e0348993f77e67e147fa582779db4742e0eb8ffb3fdf24baffceb78b6ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 10584 bytes
font_01_sfnt_off0001079a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 16792 bytes
font_02_sfnt_off00011fac.bin
19aa256c641b998f9962ce68978702ee9b669784ea78d82fc03f65e7a8db6f0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 16852 bytes