Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2179f86fbe7523…

MALICIOUS

PDF

89.1 KB Created: 2021-09-19 06:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 99062a4632ba0b479e13362b10ec4f88 SHA-1: 80613e3888453c680e9bd481acc413638db379af SHA-256: 4a2179f86fbe7523d5d542308e0914e431f1021fcf6156ef6fd6ebfa5f94acb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. This suggests an attempt to leverage these sites for malicious redirects or to host further malicious content.

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://christopherspubandgrille.com/userfiles/files/1960782057.pdf In PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/327e3b5b88395673aba7a3e6a2754295/bineverogudikarogulipoxin.pdfIn PDF document text
    • https://ijp2.com/contents/files/46085547282.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/79432070202.pdfIn PDF document text
    • http://hidramaco.com/files/files/dezazu.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/78719006005.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/80698822640.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/26883740543.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132f92edca1c---34708322190.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161362017be4ee---kowuwaxe.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/nopuzadujemizurowuzix.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/wivodaxokowiretoboduge.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/9788171414.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/86818435638.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210903145008.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/topuferumasam.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614187b04ca46---vujamevevafer.pdfIn PDF document text
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/kikutiwitanav.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/bujozar.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/81486440565.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbfb7d01d3---mizewiv.pdfIn PDF document text
    • http://charontrade.hu/data/file/95860717769.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/datewekisozevepavawupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=best+i+o+scheduler+for+androidPDF 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_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 18436 bytes
SHA-256: c96abb2a9f0f463ded1bd95a1e11fd56a59393782c6df0291e799234d51700a8
font_01_sfnt_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 10724 bytes
SHA-256: ab87dcac4863c36d9382dc48318ab7ce7172c6759356f7ca1ac7fc535510df21
font_02_sfnt_off00013eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.