Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfe2fd7b01cc1dd…

MALICIOUS

PDF

85.3 KB Created: 2021-07-28 00:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0924412b3a614b28fe1c36ea5880a5f1 SHA-1: 55fafb2d987c8f25b1ad85159bd6d92083fee79c SHA-256: 9dfe2fd7b01cc1dd88f942bfc3570788b7de3097a4e6a392ff30e18eb331e1cf
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute further malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d861d9f6---35842688041.pdf In PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc44dc2bda5---47619661186.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/50a766bc8c5d9e2c614b6959995cb3df/27853471066.pdfIn PDF document text
    • http://brlairport.com/images/file/guginakokijemejakugugo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/80a7491f464d7073cd31be4cb37733fe/xataximunivu.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/980261558.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769dd5f14d7---63309015630.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/85f906ffavhu5enfh51cptfg62/gutosoroporarud.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160863a7c6e7a1---zezebebudigawatovoje.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0454d2189a---migajudejepokebupi.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/52920202307.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/45246437997.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/22235743689.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/tafofovoba.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/20715107775.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/fawaki.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a7ef9f5cf481d485ad0faba3f9580c1f/63861747800.pdfIn PDF document text
    • http://chromatographvials.com/d/files/vexonezejakosonabani.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f32221b2de988959f74cbf2db80a9cfc/laboxevifabose.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i3v6fc4578gsje3ebu9f1f6doh/vibawug.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/f2ab15f853783d6d348c512321c7e475/giregeritelerapa.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3713af9b9---37732177648.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b25b63af330---vubefumoloxututubipo.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/buguxomerapixiru.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e939d191bbbc606ee909d31d73b495d7/tiwided.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=subway+surfers+hack+without+verificationPDF 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_off0000e766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE766 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 17440 bytes
SHA-256: 098095e4259077b779cad7d9bb2b43cf798f1f1c1e394e693a64cdb35db24606
font_02_sfnt_off00012d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D35 11060 bytes
SHA-256: 7faf3167f92f1d8f7f231fa08a6042af0ac6b9b33084f49fe15f2a467dc7a516