Malicious PDF — malware analysis report

Static analysis result for SHA-256 7301fa132f19b037…

MALICIOUS

PDF

72.1 KB Created: 2021-09-01 14:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6dc3c4574cb1a3c6def6f60541ba13d4 SHA-1: 6490539e694551d800738cd45446d720394c686f SHA-256: 7301fa132f19b037bda5723e478289595e3fa84b6d51951b0e71843522fe5b9c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://sweatrinserepeat.com/ckfinder/userfiles/files/87350153820.pdf In PDF document text
    • https://parklanehotel.asia/userfiles/file/70149102422.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/74679929582.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16073224dd333d---jowuzikosorurorojis.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2ff6e47a1a671e4b7efc404f1a03e4b4/nikakav.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/xosivogolejetopo.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/vodalawulirabanamufa.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/65749661156.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/fuvizomenujut.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a28fdfe9c88---33433212908.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/e2797b7cf180d64fb0989c88a3bfe523/nefolozupazunizazexike.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/52295392393.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/ruxikanesepagebenuwamelo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/58a0a5b7b25d9e43c5a647f531e78ce9/76703272178.pdfIn PDF document text
    • https://hirurgija.me//files/dafogaza.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/96679593733.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/65650500691.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/nagajamuxefuwanilujemokor.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0d3c71127ad1611faab88370e8970d8a/94086541650.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d26bcbff2---tinofozojizax.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/97079757406.pdfIn PDF document text
    • https://nasikampung.info/contents//files/feradipipokuz.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210605_010503_7104.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/62156818454.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d539f51866099d3a44049301ecb3256d/bosovesamareloganar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+do+i+get+green+out+of+my+hairPDF 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_off0000bb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1F 15256 bytes
SHA-256: 6feeabdb46788e9c9f7a1225ab71ee1a67d1386e573b4c371d0e9f91d4c5febc
font_01_sfnt_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 10880 bytes
SHA-256: 4a9cf6e5c4a6fac6ed8576863ecf5f679f46bb588b9fec4ef8fdd128bc4ba2db
font_02_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1