Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2f92471b0fcde6…

MALICIOUS

PDF

99.9 KB Created: 2021-06-25 21:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e8a8f5929a29bdecc2f3975e4745944 SHA-1: c07bf1a33ef278bfac65833bac7a02d0c2ce57f4 SHA-256: 3e2f92471b0fcde62d1ceed90700915563ef776f2cae1ea6f0b0504b0e3cc57c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a malicious PDF designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://alexanderkanevskyartistbiography.com/clientMedia/file/tazojarorono.pdf In PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/i6s2gij352i1k898068teuucv8/57877459493.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/51f9776db265ae2a1d3297d59ae5bdc8/19814585814.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c24d88e4f5e---69572259435.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/17292863297.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/bamowozezeduwebu.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769e17bafc3---93234314001.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/mapoti.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7329f633e1b5af9dc417666df3b7b75f/94257188537.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d905ed893b---sirokemuriwirari.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/zivigamikiroruxuzoxivu.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/e4504ff6a2c301497af8dc08abd4c752/69496635406.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e749aa9e65---tevojes.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/har5l0bp1c3vv1t840orhvpa2e/68434301575.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/49170482725.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc9a5972c---guvasagowozife.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/36757334799.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/bb62f0b99f46ae3f67747fb9eeda5bfc/judikinejifezafozibegutax.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077842e3e8f1---82213014919.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160834ab92bfe8---gadup.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/75065ea4158497eaceeedf2a1032b459/14996424240.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160985e5e761fa---fimajazuvuzuzenuxaxamesek.pdfIn PDF document text
    • https://songuryazilim.com/calisma2/files/uploads/bominaxofexulapo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073545156582---36151051463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=basic+needs+for+survivalPDF 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_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 10592 bytes
SHA-256: d16fd1cea3f5e4b2529f3c01b0f10bd452b54d6d41f283dc84ccefd261c0b679
font_01_sfnt_off00013d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D31 17208 bytes
SHA-256: 5814b3b9d0341c63b85742bac934114403fd0f4d43110898a4439f241c26aa25
font_02_sfnt_off00016a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1