Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02e8eb40cf197b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-18 00:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 53f62fb1dc21160e25f0625d6946dbbc SHA-1: 273bec98872a6260863db77ef2471ef86e124dbe SHA-256: 5e02e8eb40cf197b50d963d0504029a1663c6193d550077202e5c2b8fa27e44d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's intended to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=roblox+wap+id PDF link annotation
    • https://cuisinescartier.ca/upload/editor/file/19141813650.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/ximida.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/46560845858.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210912190356_npfenx.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/gokodide.pdfIn PDF document text
    • http://edeins.com/userfiles/file/465203866.pdfIn PDF document text
    • http://honghuibio.com/d/files/70282361652.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/5195009509.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/12648547663.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e05ed84bbdbfe7af97288f0a23a4e3b1/33388111000.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/tafowapavola.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad8244f40f---41216703378.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/26334677190.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/46773902483.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/63280974422.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/mamotapenata.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa6839424d---wawuwiturimufiduluj.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/78894123889.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c67f1409---10777115038.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/gukinarawidufevuxaluzarow.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/mekirof.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/72265206684.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/33404466419.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210910131314.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_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 18260 bytes
SHA-256: 430ea581fd807caef10a4c7fc596cb17e4a00e142b61d8e69c73cd9e8e610656
font_02_sfnt_off00012c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4E 10156 bytes
SHA-256: 6ee669885761cf86b4e95fce425ab84257fe0ce85a2af60d3a559ae844742c7f