Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ca0617b0d0b24f…

MALICIOUS

PDF

77.6 KB Created: 2021-09-13 00:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 68ceb9b421441639b67e5c2bb24c1e0e SHA-1: b19cdf9032228ae03150b76d26e5faecff75504a SHA-256: 96ca0617b0d0b24f78e10035bb1592d9890c96647c59a170502f5375416d43f8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing 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 related to phishing or malware delivery. No scripts were extracted, but the presence of multiple external URLs and the 'compromised_cms_upload_link_farm' heuristic point to a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7325

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://drafthe.ru/uplcv?utm_term=mtg+arena+android+release+date PDF link annotation
    • http://olympusflights.com/files/files/birofaginubak.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/tadabikigobuluketut.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/juforev.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/15989066404.pdfIn PDF document text
    • http://ippon.lv/uploads/File/27050717148.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/butasalipurazizuwarexabi.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/lojewavaduma.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/65625700059.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/mujepavotuxejo.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/19157626621.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210901065251.pdfIn PDF document text
    • https://iohrp.org/f_files/files/38099146320.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/mekegokiwedim.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/32046450635.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/69085158.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/e1022eac9ffc3aee1369e0c6eb97c5a5/95932420448.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613acd29cfffc---27595964073.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/158f9esaanrb1d14dfsb1uhkce/71501356866.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/resejuriv.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/vuzesujiv.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/bubino.pdfIn 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_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 18976 bytes
SHA-256: f6ffa69cf4aa66ec2612fbb85369157a2fa51cc1b46f058a033957067cc74c24
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 10416 bytes
SHA-256: b8a0df7d950359146e427c8c1fe90b4af300093d8334b22d3bafe59c44c7b6d5
font_02_sfnt_off00011e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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