Malicious PDF — malware analysis report

Static analysis result for SHA-256 be40b6376168f48e…

MALICIOUS

PDF

116.9 KB Created: 2021-04-14 07:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cc2efa5bee1999c3e5ec8cde1034490c SHA-1: f64f188f32909d74a6338d22c6cd4bf44c3c94a6 SHA-256: be40b6376168f48ec1976cc3afbc331eb7b10f5294ddc570cba28a92a5e3a5a7
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9123

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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 https://xezojetit.ru/strik?utm_term=oxford+house+nj+pdf PDF link annotation
    • http://tiktokhd.design/66785268218voen7.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/beranozibumoderur.pdfIn PDF document text
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/dagosesur.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/daviketadopal.pdfIn PDF document text
    • http://abistrans.ru/testing_sensory_receptors_for_touch_lab_answers7kmxc.pdfIn PDF document text
    • http://nobomutesisega.iblogger.org/vuwurupumipezibelavipe.pdfIn PDF document text
    • http://zelopaqq.xyz/86842468756g6qz7.pdfIn PDF document text
    • http://thefortykuti.com/asus_m2n68-am_plus_manual_espaol36ezp.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/4e49580.pdfIn PDF document text
    • http://jobauthor.online/79465477665k8vpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firasakujataj.epizy.com/tudunuwatudigibasitut.pdfIn PDF document text
    • http://batopodati.epizy.com/serie_after_livro_5.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/plague_inc_premium_apk_no_mods.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_a670ba6721be49eca16d8665865852c1.pdf?index=trueIn PDF document text
    • https://d5a1aaf8-5562-43de-9c14-ffbb92c46efa.filesusr.com/ugd/f64db8_7c6eeed0a5e34beeb6bf18746ce7adb4.pdf?index=trueIn PDF document text
    • http://bibarixe.epizy.com/asbestos_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/red_dead_redemption_2_trophy_list.pdfIn PDF document text
    • http://sabodivatipapan.epizy.com/kejeraterupuvukugikado.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_1be44525fe004382ae3a1fbc02d34245.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001991f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1991F 4812 bytes
SHA-256: 64eb30088cb9ffd4be815b278c14481429e34738f4941c4861aa449678e4799e
font_01_sfnt_off0001a97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A97B 11524 bytes
SHA-256: 8a151f62e6448328ff405b74b857a6b9709860f803fde8b56a687b428b3f8652

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