Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b370f159a164254…

MALICIOUS

PDF

87.5 KB Created: 2021-07-21 00:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2809a74d0af27550de3e8691cbcbe7c7 SHA-1: 2b1404f6d139cd968a2128db8e04e2f5e256697a SHA-256: 0b370f159a164254404c358299e573669e0ce1a1e3d40dd39bfe145665565ebe
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coronado1977.com/clients/54390/File/minefipipi.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0dd3ebb80---61609572658.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/nutomugiwafa.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/14828465169.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98cc1fd3f---14648192498.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/9279819953.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e99ebaa49---22801162060.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b574273f128bbb830bd9c98a0030a254/44095779560.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/aev9h8t7nq8cgp5fu3iqitcf92/25071262157.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b6fc0ba70---mitilub.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/83094938794.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/7bcd3f6041d1333c6c03f1d8fae4c94c/88010673457.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/kokofofitivejogo.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a98000cef3712ec7d169428f30913466/gutexefomidetumuwokapeno.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3ffda958f034bedd93ef0dec0535bdb8/mimamipuworilepumizofu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/81449517587.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/16dc5f15c64bc6c2105dcc406e84256c/9184539391.pdfIn PDF document text
    • http://ned.ru/uploads/files/86875580355.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/mawogujegujovuguwajonu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/fndnernngkm5333c1ok1gh3fu0/72529081982.pdfIn PDF document text
    • http://retailcop.ca/files/xitoxodilunuge.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/6oock1spno0atedhqspqnoeuqo/ruvofow.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/kexazaduk.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210709_0B2042A0D8827F24.pdfIn PDF document text
    • http://z500.si/files/28301006918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=78+divided+by+4PDF 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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 18452 bytes
SHA-256: 58d17cc2b00f75c8efe72d2e233cf6b00c9a3c5255bfc465d9bb498fa900c34e
font_01_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC2 10000 bytes
SHA-256: f07ca96ab5a247c5ee6e8e263c5e05ae9580c98f1b37940c5debe6d9f19495a5

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