Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e985e58045617d…

MALICIOUS

PDF

185.1 KB Created: 2021-06-24 05:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9f1c5feeab8427b0f7e89b8cc1435f26 SHA-1: 49ac58757e4250e527687d97796d049ae7ef44fb SHA-256: 03e985e58045617dbc2b55307f06916ddb94aafcdc07a716aa6e58f97cb67e77
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm structure, with numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The presence of these links and the overall structure strongly indicate an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e12c2ff6---mogigopetakij.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b39d1f244a---61305278083.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/3ad156957954ad88c2755a9a74b9b517/54757519612.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/f0e1c2ab151e6516c25f85a3f780b85b/mafemobobepudozulawa.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/1752507635.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ee8291a8cdfdf82fa344eabf7ca7b210/rubobivedokogubimela.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d940993cf1---ledepesopetugobokan.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/7098310183.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/q9senj8rmq1j35k51lmsaeqnpl/foxezuwazusaxo.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c188ab92fad---74259522163.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/diminasinebufaxu.pdfIn PDF document text
    • https://purefeeling8.com/data/file/towesuxiripe.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2pun6ucc8nvfpo228e70ar08mi/viliduxixawuru.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/48849538203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=100+power+tips+for+fpga+designers+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 142924 bytes
SHA-256: 5540a10bdb8337ce9740eef46833b7d86598bb44bad29e830b72e1aae65e12d8
font_01_sfnt_off0002959c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2959C 5368 bytes
SHA-256: 13b482fb9958cc1143b73e66b24a551025fb662cd3f624a15f2c47595a4632b4
font_02_sfnt_off0002a800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A800 2172 bytes
SHA-256: 172c0d5209896229fddf18b2a12901dceaef48b441da44dc07bc1f0d5d493598
font_03_sfnt_off0002b160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B160 10200 bytes
SHA-256: c2103da79d3821fbc8136b588848541749d8cf52de095ed373af0a0d14c51837