Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a7ce3d17b7739a…

MALICIOUS

PDF

87.3 KB Created: 2021-07-18 17:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5405533d4e1a2b0b885df48ee1640001 SHA-1: 4f3c9eef3105dc411ef1fcc2533c4235ba675a5b SHA-256: 08a7ce3d17b7739a6c0dddbd11e49145be748c58a55cdbbf19562e6665932a34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, characteristic of a link farm. These links are likely used to redirect users to phishing sites or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://santamariamikado.com/uploads/files/94572671193.pdf In PDF document text
    • http://apcmagon.com/userfiles/mozexapipivejawoxabi.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6b8d487ecf526aa65de3f1ebb6c6dc09/11075011208.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/89408668481.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/wugexupe.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210708_4F8B7CC20DFCBE2A.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/d64fc7f795a80c5a31bc8f8ce07af8f9/4557147852.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/bonixuponofafopudakidewuj.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/tifebumuvapotobebo.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/pigajunojo.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/73295904556.pdfIn PDF document text
    • http://gptools.net/userfiles/file/nixipubema.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/41291988909.pdfIn PDF document text
    • http://ihvanturizm.com/rsm/files/54336793279.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608472831313a---mububumapi.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/wabomidupurukitamofeje.pdfIn PDF document text
    • https://digireg.cz/upload/senevifa.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b16705094b8---sexufiwirigudejenidapezom.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f170a46819b924dfa2bfb0c99e711e3a/bironujawasutekat.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fa00bd8d---36709757715.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ncpodjeuq7ug10np05mdoo5mc2/39443229116.pdfIn PDF document text
    • http://tuccifamilyonline.com/clients/b/b5/b5aed9f4ae8fd2b300021b46b426cae6/File/18662311239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+make+pdf+in+wordpadPDF 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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 17156 bytes
SHA-256: 0b4241887ac91551810aecd2c3dd42735fbd5970172a41b697e779eb35512602
font_02_sfnt_off000137f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F5 10616 bytes
SHA-256: bc69fbb87ebcd3d2debe313d27d571de378357b78467ccc22291f2439e1a04a3

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