Malicious PDF — malware analysis report

Static analysis result for SHA-256 5696ce172c25e212…

MALICIOUS

PDF

82.6 KB Created: 2021-07-05 18:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2ec03496b53f5f6d28433da7b3abe71 SHA-1: cea1fad6fff6bf325b953d26dc28069b639bec97 SHA-256: 5696ce172c25e212e4105ba5047f887f997244ef9f5fab61587462b0e56b56ec
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious or phishing sites. The presence of a link farm and UTM parameters suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://atya.eu/files/file/jagorexod.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af2e9223c5---13855773926.pdf
    • http://coreaad.com/DreamDataUpload/file/pekatoxidulalugowel.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/11efe9f47afe09ae48637331afbdf382/pizoremasewedosalurut.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/hlti1kjpmtc2muvtp54lqdkiel/vanalumafurinonokasez.pdf
    • http://kythuatviet.vn/uploads/userfiles/file/94103344790.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c2cc057e---35994180626.pdf
    • http://copingconversations.com/userfiles/file/kidawejozukoritiniwikeku.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070db21287d3---supukasukonu.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/13944b01f3cd270f504a4f200b4a30dc/mafijoti.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/nabivudexet.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2e478a482271295f5792f0c5ae591cc6/63652449148.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e63bd09ecb53e2be22d2f826225f6763/gufotin.pdf
    • http://jyjwqj.com/uploadfile/file///2021070421085862.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bec16ecdefb---vemed.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/27372363827.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/ieldvh9ja5ejlsnao5vbe5oin0/xalifa.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9b95b2e5---15920943338.pdf
    • http://sewakendragroup.com/userfiles/file/rujozadakejotewejig.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d72a3e226024a5eefd602317a2561dc1/vigukovadovit.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083e9e1b43c5---pipikowalire.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db4f12fcad---zozajenasez.pdf
    • http://gtshotel.it/images/file/20406544736.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/feacab3dc3eba650ee518e10516242ba/9362474268.pdf
    • http://c2r-auto.com/uploadfiles/file/2021052505190873499.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d81a2de9996---27310667307.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7cc1c7d0d---tekanonozuxidogudodenewa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=rye+and+vermouth
    • 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_off0000e0a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 16792 bytes
font_01_sfnt_off0000f8b4.bin
2cc2d0a132d49fe9e0c3f442edd2371a79c83b5abf2f7d34033de7f38fbae26e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 17160 bytes
font_02_sfnt_off00012543.bin
1151cffdf87912f4095c70bc17872ecb815e104f64cc12e50f83b86154c18bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 10532 bytes

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