Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b27ce7b68d52a0…

MALICIOUS

PDF

113.7 KB Created: 2021-06-28 13:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8094e0b1708a36189f4d5f942244010c SHA-1: 74c22c19071e4d7da1f7ae22675f056bad6272c8 SHA-256: d8b27ce7b68d52a0ac3ecc7a1402696ff51e0ba32ef2feb7a381d784e1e47ce9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The file contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://philabc.ru/uplcv?utm_term=liberalization+in+business+environment
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/495c3ff4a4ce93e3d5015d3c0970f607/sinotunoxapo.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cfc0f3d8f---47257170063.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaefc274421---sowebidonadalikitobum.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/168e8dd8bb41cb1bdc630756fbbe598a/bipovufuxinifobuzexibusa.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084a30e1a39e---noxuxatodunabom.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607933aa2d9d1---53890356518.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160887aea2b060---53525835110.pdf
    • http://beiks.info/public/file/bovuwexojemekoba.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/19988463572de02a9bcbac2e8590e607/4113739011.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/27826dccdf4e32df76cc3c96f40fafe0/72860936909.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/41bff4f8fc04c4e2ecb70a459e87ebda/poruxazomoribaveji.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160874881149b1---34538217211.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/348a349be5a57107d5d1bb63458dcc3c/pikujalinugofebakovo.pdf
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/jlcb9dlqlu8dk9o3gm3a3en2nv/36773257803.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/69ae109285a70a05e5ce2910e784660b/25510869949.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9af1c726e2---webufivizavuke.pdf
    • https://betenrealestate.com/sites/default/files/file/xavusuvipekikele.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cff0105943---74697499561.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c871c4dca08---bebabinetevatumuwine.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/i3704b7nq6a6qd942qbm4q2p3d/dowixivezotuwonodiwi.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb28a92d290---6953215775.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56461d7445---57679664655.pdf
    • http://alkanboya.com/files/file///20352715559.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160beaa69069a9---36906591365.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_off000158b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158B7 16792 bytes
font_01_sfnt_off000170c9.bin
9ae71bcfad018c05a37b1569f6ca8d9219e8f93b277b9f266e3315609235fb0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170C9 18468 bytes
font_02_sfnt_off0001a15d.bin
fc459caaf92dfd84b123693cd195f9d23a5910bcacb002e85962d63a4b268caa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A15D 10592 bytes

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