Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89f5bd7edc7bccd…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 08:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9c7f982e942bb395b593e478560a1460 SHA-1: ce4d5063c419c37d26b4b4a95278ab2f53cd1366 SHA-256: d89f5bd7edc7bccd83e35f25a589ad2eda4d443b3ecfb5a47a5722721f48af76
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories. These links likely serve as landing pages for phishing or malware delivery, exploiting the user's trust in document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608068a076850---pazogepuralivemiva.pdf In PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/6d8b62109d82e8d160e2ac785fcca928/niselijufetaseporu.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/65246c2a1c4113bd4aee946f2fb5ee7d/situj.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3ecf676b3e93edd12dc5aab96011b3ff/45562135823.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/8821956047.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/10845184113.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/naxewonaxifulifolazi.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/murujubobegarinerilopu.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/0065feaf66a16bba4a7b3ee0ee417a70/vopotixego.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/6c1efcaacd976a293e97380ee2eafb1a/3755478043.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/mepurikiluxogopugonepumir.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/92496994799.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0eded0499bb20776c8ca39c7a482b584/26708508159.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/8kghjg6h1tt71pegqpcs9iqiut/dakajuxewigemotiji.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b53f2fd61---kevoratebamijofiw.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/77016066433.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/47nl1l9tibl2iag7viffk4bc3d/dexusutewofejifetisejusa.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/251t7pk9uv6t8dujecpu88l6h2/kuxesevazilijuwologaniv.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16121a2d5eb5be---zipakigujof.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/97243643308.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609171f511291---47586087925.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/75373819505.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b3e233eaf87bf85b10e18f1c87877f02/kamezawefinofanut.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/fukuditosaneguroj.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/696eb73e624c2d882cd45a2d227adaf3/fijekiloxelugijo.pdfIn PDF document text
    • http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/92630098540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=medical+encyclopedia+book+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 17712 bytes
SHA-256: 49a3bf7373ec9d7d15c11d9ec58657ecdb5908444bcbac2593a1f9db720a859e
font_01_sfnt_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 10672 bytes
SHA-256: a654e75b49b3d4c93ef00e0e2b6d556f08b37ec87eaac1836b10184287fe0cc7
font_02_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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