Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e9f002f556bc69…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 18:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 68f71c0e18b3dc7db03d66a9ae513efd SHA-1: 9951b3d2ed77eb5610169e9ecc31c7033d7d3aa8 SHA-256: c2e9f002f556bc69bbec59a8bacb6ff2703fc6793eb4d1db6f0dd2b8532aee4a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, typical of phishing campaigns, with multiple links pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://fcraregistration.com/UploadedData/file/1902601869.pdf In PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/89699726470.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/74f9b2c1034ab028ffc2a1dd43e6e08b/denabe.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xirutumomizi.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/55328408221.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/887355f3e1cb90e0d1d6ebe4c635689e/molesonurosoka.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/34928259318.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/zagaxolewobuwenakedanos.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1c85f53a456c032de889df28740c6424/sebefikawu.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/nasaxojenuwunozomebu.pdfIn PDF document text
    • http://analhospital.net/file/files/pijaxomiwupavipepejoxuli.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/73317805900.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/bugozabopi.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/ligiduwidareladawazix.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/48082823370.pdfIn PDF document text
    • http://datcat.vn/2018/file/sesodel.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/96273210162.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/mipelositevagizolerimose.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/wiruzufibupotur.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/migadazexokemu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a082f9abe0---75334414625.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/62602196817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+do+i+find+the+phone+number+for+my+tabletPDF 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_off0000b0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F9 11028 bytes
SHA-256: 448f30198dc09a8b013f4dd38625e8a6adc3f756a8e1513055dcbaeab770b032
font_02_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 14628 bytes
SHA-256: c66d1cd85bb27e25dc02ff21a0b30aba742c1756a89f620ea02040d16d82951a

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