Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2d5942764a6180…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 04:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74f49f8e5c947642f8fb2c4172b4f63a SHA-1: 7218a47c9019f6b749209b93283b7f21a90c8df3 SHA-256: 0e2d5942764a61809dedd0666b3749eeae0c09e4cd4c494ba7ddcf101b74f366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338f4f70f6f---patifupijawosesajufe.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/kpmoft9ntsisr17g3i7h746sm9/jolef.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/57516842657.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210902040903.pdfIn PDF document text
    • https://tekartltd.com/upload/files/75537006297.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///9532408819.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/82639270985.pdfIn PDF document text
    • http://delve-cr.com/uploads/45977750254.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/86718850591.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16130443255875---49307743677.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f1c47aabb8f6a167cc10b95b497a356d/nuxowut.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/zenoroxibuziwazajopo.pdfIn PDF document text
    • http://askort.pl/Upload/file/lekikinupoga.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/83387402339.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/23867510179.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090712550279.pdfIn PDF document text
    • https://onlinendttraining.com/files/watipamobo.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/nibidatif.pdfIn PDF document text
    • https://gilbertems.com/videos/file/lelurov.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/matet.pdfIn PDF document text
    • http://samtle.net/ckupload/files/83839312809.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/gasevazigepojawodumadep.pdfIn PDF document text
    • https://path.mn/userfiles/files/24440020570.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/10608777153.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/kuzowobivaziboxurogex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=frank+netter+atlas+pdfPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/datenuf.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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 10348 bytes
SHA-256: 5df86a35fc906b19a5b75b74446b357c83a66c5ae159c1dc5f7b6fb9049a65d5
font_01_sfnt_off0000f9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001120e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120E 18036 bytes
SHA-256: 6de0acbd1a13506aee41a9fdd4f02398e48db1aeee7cd6f3059dff5dd4d68a8c

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