Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad970bc70aaa55dc…

MALICIOUS

PDF

90.4 KB Created: 2021-06-29 14:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6faa0153d90ed15873fac05a88f02b56 SHA-1: 12d8334d477e4e121a5c9481e8a6ac0698f03b23 SHA-256: ad970bc70aaa55dc740ea7b6e063c7c067d9466bf2a32fb9e7156c60e293923d
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download' button lure further supports this. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score indicate malicious intent, likely to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=read+the+invitation+and+answer+the+questions
    • https://rajatotogroup1.com/contents//files/70457468000.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/36c2a3a69d21941e6cc484da686ec846/78575277422.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd1e48e24d---12935050863.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/756947b60e2f243c2dc971dc17379292/8167843990.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/eb34c67fd8f86b97b0344e9c3c493714/16079512672.pdf
    • https://deesudcoolingtower.com/userfiles/file/labibapofasobudov.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2a78d9ee---zojuvixunetoj.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8944c3c1f---didukivijilubaxelubukali.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869d0fc8b14---mufuva.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607804dc7b25c---dojodidopogewolufu.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ccl0u99t5tk7fttp04o2aenvg3/parotevod.pdf
    • https://agermag.ro/mm/file/tiruzo.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rr1hehbpa01sp4ign60aiol64r/20016732853.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d08a9e40a76---jinipinobafokir.pdf
    • http://hanasushipickup.com/uploads/files/jejunejunemusolomoguxal.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/3f7o6fgnqu7bsslhj1876h976v/fimebe.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/7401406899.pdf
    • http://nguyenthaotech.com/upload/files/12037123846.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb40c1dc9---nimewal.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5e12c1639---2234233690.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/lds2to5vvi5e6scrp249n8rtc5/4469371793.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/b6dbubmlhgr3htjiidof03utkh/xozidefajufujefakabur.pdf
    • http://qianxish.com/ckfind_image/files/vetofoxil.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/4b20e9c54650abf762928993f0c6c288/wawajuforuwosepeme.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/chc63ick8akb86q35dhhsu4so6/jewukoreli.pdf
    • http://klassn.com/ckfinder/userfiles/files/gimuwiwagapajapezize.pdf
    • 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_off0000fc76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 16792 bytes
font_01_sfnt_off00011488.bin
eff100f6cb3cf1bc667986c31447e5d316d464bcac26767e0eaef612e2e5e072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11488 17936 bytes
font_02_sfnt_off0001439d.bin
caaac3b5a19cd69eddc77516c20618c71fdb5aa9f4f7c20118d73fed59e1104f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 10740 bytes

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