Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2d9383759b3b06…

MALICIOUS

PDF

97.5 KB Created: 2021-08-03 00:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7d43762335438ca9303a858c0a3f06dc SHA-1: add26f16d572d39626e35ca870c273340e3cf0ac SHA-256: cc2d9383759b3b06b8c766cf90c44227c6c79c30b937ec8f69cecacc227f37b5
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of URLs, many pointing to compromised or disposable hosting, indicating a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to exploit vulnerabilities or deliver a secondary payload via the embedded JavaScript and linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=como+hacer+jabones+caseros+f%C3%A1ciles+para+ni%C3%B1os PDF link annotation
    • http://faradtvandor.hu/picture/userfiles/file/82722155772.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/zagibutadunebo.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/pomowiroraz.pdfIn PDF document text
    • http://kisikana.hr/UserFiles/files/83599204743.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/69403871237.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/74216747852.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16098332965e40---todop.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/wewowexa.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/54427229897.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/guxugoxujiwefuz.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd039437f---67696076304.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2705d8529---63905454514.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/ribibim.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/45896749675.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/j8rkc091phi6sv7f94legt1de4/41311067718.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160739e362b956---ropulesogefupukibo.pdfIn PDF document text
    • http://www.xn--12cfj6cf4edkfa3b0bnvcc0ewa8fd0a7nth.com/ckfinder/userfiles/files/93897339592.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/cfebe4618d89b00149dc39c47050ccd0/63795825574.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/27253656266.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/76342486358.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/8046015963.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/04cfc1e6464097f1ba56ae1decf4ef60/57963797886.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001162b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162B 11336 bytes
SHA-256: 34d8f98bd0bd6f8c7c913731e0f34b817a9e8e6d22914dccaa8c8c29c7e10b01
font_01_sfnt_off00012fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000147ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CA 17988 bytes
SHA-256: 1cc9e3c4e115acde8d3edd0add1a261d9c2dadefe432e840f3f010e6f2bc519c

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