Malicious PDF — malware analysis report

Static analysis result for SHA-256 336d5a82a01fb75b…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 22:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6d7336e1cdb369fc305995cb6d144b25 SHA-1: 3d561c128c9051c8832faceccd763a3eda3f8e62 SHA-256: 336d5a82a01fb75b1869c102dfab8e006f0b53026b2eb1b98140a1e43e70c632
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to various domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external sites, potentially for credential harvesting or further payload delivery.

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 https://philabc.ru/uplcv?utm_term=accountant+job+interview+questions+and+answers+pdf PDF link annotation
    • http://snsi.jp/image/news_file/tofatef.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/73182852058.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/91679295111.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/32240319636.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/nowogineferusabakotuwu.pdfIn PDF document text
    • https://badoza.net/userfiles/file/45283201850.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/27cbbab75552a561992a58cc04b25cb1/75744483104.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/de2db13b0018a6d4a5f340c76df0f23d/23874930802.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/viluxopejenagari.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/96824586747.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/rawevifasejusekonew.pdfIn PDF document text
    • http://midospa.com/upload/files/67172972936.pdfIn PDF document text
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/97473756524.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/lodomuvixopujowesokaxexud.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/fabofarawulezis.pdfIn PDF document text
    • http://teraval.cz/res/file/guvatad.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1848d8762a---3781395958.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/87848311393.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/87263909004.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///lafepisafavijag.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/redijet.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name//files/8142566581.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/ff4cd13c2e8c6019244962794b771bd8/23776952469.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c08c72352---jejololezowefifov.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/16033087597.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076051d08d8a---gevub.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_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 11216 bytes
SHA-256: 6d52f941c397a9d439931bc4fe2df08654ec50e40b61cfddbf2db0078fe2a2f3
font_01_sfnt_off0000f37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 17696 bytes
SHA-256: 41c58b80733d43ab48acff2368c3e0438b4702d31de2d4959c349a90ca3c3efa
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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