Malicious PDF — malware analysis report

Static analysis result for SHA-256 73768b6dee62392e…

MALICIOUS

PDF

74.4 KB Created: 2021-09-08 00:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5348229b42601293f9d8fd06742523f5 SHA-1: 4a1af36ff8269ecfdc1a18bd427883bc73103a89 SHA-256: 73768b6dee62392e05d9ac482a3e235e237f41733b4cd105eaa578181166113d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links point towards an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3f5e46b4618a4fc3109dd1351010dd49/soketilagaj.pdf In PDF document text
    • http://aucoindeshalles.com/menu/file/fadumogofetoxi.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/sefap.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3eb6f1bd4---71136753687.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/17275146450.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/wevukimovij.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/14932933512.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/pipanifoju.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/14510749511.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/57692485023.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/tupuxuwaguxo.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/nakenubomosobukebedewup.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/d78dc217d189f62a49b3ce8d02da098e/tijidirarefopunedi.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/23518091785.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/30017087931.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8af498e745581e70f1284041fd56c73f/sutavavevuzexoboronutab.pdfIn PDF document text
    • https://latework.cz/soubory/negedurav.pdfIn PDF document text
    • http://nsureunion.com/clients/71556/File/71493794484.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/3831842570.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/jixupomo.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/76674710581.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/xupanunajibasisenexuzigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=battery+tender+800+owners+manualPDF 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_off0000bfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 16416 bytes
SHA-256: d41e474f0f00f993699f75140b8ae6c7a0f2a90f5b3588b844916cdf31bfffe4
font_02_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 11000 bytes
SHA-256: fe50a7ee0f82c9e91c9313a53442a413c6d60799d3affbb0635ee781f1b51dd2