Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd710717c44c730…

MALICIOUS

PDF

70.7 KB Created: 2021-09-28 12:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 689c458906d03ec12d654bbf02b5efe0 SHA-1: 5e2fb35b6d94ab01824ffbcc9d6de8ebfd236e73 SHA-256: 6bd710717c44c730fd8211da816637217abfc2b5babf952df2555dcd5bfe9838
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it's designed to redirect users to phishing or malware distribution sites. The presence of embedded JavaScript (T1059.007) is a key indicator of its execution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://garglob.ru/uplcv?utm_term=how+do+i+screen+mirror+my+phone+to+tv PDF link annotation
    • http://autofactory-jin.com/js/upload/files/21521088965.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/ff74cb2a14e3c92730ec0226abe32dee/gilin.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/2870287110.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/mezosuwugefezof.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/rovovobalamixokiteju.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/zegafi.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/10138718754.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/46835bb66e352053a75040da98c1aef0/69516696739.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/17675544340.pdfIn PDF document text
    • https://www.food-equipment-store.com/fckeditor/uploads/file/72224269.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/wukezorutupuguvisinud.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/65342817966.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/63369109946.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/72180300017.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/fakaf.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/vutivujalozofoxogoxada.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/fadasapogodiwoza.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109061107246294.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c99811d685---84739603437.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/34151514263.pdfIn PDF document text
    • https://blokhol.com/upload/files/97890427795.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/30402777300.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/legutujorutozek.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/kexuvinar.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148ace807ab1---mexuxa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC3 16636 bytes
SHA-256: a91344d7564b557988f8a27347ef162a06aba86501ea227e5ce24681b32c4318
font_02_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10828 bytes
SHA-256: fd0be48f80047a548d9c8773cee9908054dc478fff13f6f4111017789a88a564