Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1334a9c57c2ce1f…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 13:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d98e998d4a92e8a7d18acba7c11bef3f SHA-1: 4c9741af1a6633a6a1c6b2c4161de938c93b6d5b SHA-256: d1334a9c57c2ce1f9fa8f9cf680e6408ecbdd5a28e5b2bd37276ca11f2f989ff
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, specifically by instructing the user to engage with remote support tools. This is strongly indicated by the 'SE_REMOTE_SUPPORT_LURE' heuristic. The document also contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. While no scripts were directly extracted, the overall structure and heuristics point towards a malicious intent to exploit user trust for unauthorized access or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/bo1ruvhaevr9jrdiutke5q0742/jeneluzoferomafinas.pdf In PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/52abe0d56a55476974c452d378226c48/77573539923.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/20436127568.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/14523735640.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f1dde83e0defafff77dab8e355e6c8ef/14503559257.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/tobapipoj.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c88271c4e1---warevekabutazefekesiru.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4db768eab03d6e74b0eed70bb4ac7b98/11666314072.pdfIn PDF document text
    • https://maisonforville.be/documents/file/13550768716.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pughcd8t4ufsqker8rfp078n5c/92399616320.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/664866491.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43b18a3fc4---96559027963.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/8eed6e6aa7a372098414debbe1301e90/92159761174.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967d858ada7---75328943276.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/siferigasebosasobogex.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/72527213245.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/luwenusinosuwekezesin.pdfIn PDF document text
    • http://maidichike.com/upload/files/bogukuvimaxinusev.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/16125660295.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/50101698168.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c66260bbe2a75cb1063cd73b4660fe35/79889599925.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/10264581372.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/8304cbaa5a9f434ec17e7b46f4aa4901/zuxusukivakotefoguwolak.pdfIn PDF document text
    • https://datajournonepal.org/files/japazananawadegature.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=crop+production+and+management+class+8+mcq+pdfPDF 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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 11448 bytes
SHA-256: ab280a4faed2cea4b8104a72e5a46f53b1ae0060f5737a59d5f55d068297f174
font_01_sfnt_off000101a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 17140 bytes
SHA-256: 564cf515474c170016cee38fbb0e49154a0f1f9f3003d8c7298f30a239a71451

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