Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90ab2b1106d7d79…

MALICIOUS

PDF

112.7 KB Created: 2021-06-28 07:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e7026582b7301345aa1ddb3569a19ca SHA-1: 6cbe706cd4fff77f5a895ec711a3b87bef34a4ad SHA-256: a90ab2b1106d7d79ff35c2626b32b6534d87f5df5a8b9f71630c0f3798e3b2ae
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier. Heuristics indicate it functions as a link farm, directing users to compromised WordPress sites and potentially disposable hosting, consistent with an advance-fee scam lure. The document's structure and numerous external links suggest an attempt to trick the user into downloading further malicious content or engaging in fraudulent activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961b1a35c23---35199565031.pdf
    • http://divorce-difficile.fr/userfiles/file/bivekidapusib.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b199dedd584---pikupo.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080918d827ba---24716427318.pdf
    • http://asbufestival.com/uploads/FCK_files/file/zizamuxijivudibemazuxe.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a3eb48aab50e5d2750690a50dffe7327/dukefuxebe.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ff244075f8f1c3e104ff6f70b21f68b6/diradadilolunumovim.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7abdcf9e588c6440fac7a16b4804e006/revojalikixoxidu.pdf
    • http://train-in-japan.com/images/blog//file/jidebufajudagirixubi.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948915c76c4---nanizadanuvutobisotulo.pdf
    • https://kalewebsatis.com/calisma2/files/uploads/33782678578.pdf
    • https://wecareu.net/ckfinder/userfiles/files/35734484022.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a05d1b022d---25463979025.pdf
    • https://alexandrapanayotou.com/web/images/static/file/radabubobavewege.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/c38ad49b9a6083824e05ff835bd8ecd8/ribovadupexegirisev.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7d9dfa53688ac22bb6110631b9460185/8091581750.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/e34eb96b1b743e30270208851b1e12c0/vuwerigusa.pdf
    • http://pampa.be/uploads/userfiles/files/51564763650.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099baa99c6f3---liveka.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/358307baae7291a64973925efb7908a3/losagi.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/cfdb52918d22fdf3c7d626abb177e597/vofuxadexar.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b56babd7b0---lozitinomilowezufiwozem.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3ead20905eb15f211861d00177df960c/divizigugutusi.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68dd907f86---rapevit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=unturned+vehicle+id+helicopter
    • 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_off0001550a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1550A 16792 bytes
font_01_sfnt_off00016d1c.bin
9c4eff981d982425e784ddb2263c60c5828d189a26941fc50a6a78fe8feeee15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1C 19176 bytes
font_02_sfnt_off00019df7.bin
4014ac5c8b250bffa82e9e524ce0f1069bdc4d3a6bceb659f07ea8d35f5a9e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DF7 10456 bytes

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