Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9143705e783bb9a…

MALICIOUS

PDF

81.4 KB Created: 2021-04-16 23:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 659e4af71be2d41951d9d197b85e2bc5 SHA-1: 4447e4557a3ff09909d8d6eb7679b2ce321daa45 SHA-256: a9143705e783bb9a89c4f218b7cc636b992269d97ad3071ea69439e0279aea1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing or malicious content delivery mechanism. It contains a large number of external links, forming a link farm, with one prominent URL pointing to a suspicious domain that appears to be part of a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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 https://xajibur.ru/strik?utm_term=descargar+manual+de+capacidad+de+carreteras+hcm+2010+pdf PDF link annotation
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/wevinu-devon.pdfIn PDF document text
    • https://mudikelupiviw.weebly.com/uploads/1/3/5/3/135300608/lonazanelumesopat.pdfIn PDF document text
    • https://xobiverubagosag.weebly.com/uploads/1/3/4/7/134711173/8317482.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/favinefib_lonez_wavotigufak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391925/normal_5fd03ea970c59.pdfIn PDF document text
    • https://vimavaduziwali.weebly.com/uploads/1/3/1/8/131856569/mujiso-ziwiberadunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fd8bf8186a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_604a72fd58aa8.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/tosikepareza.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/12b4eb.pdfIn PDF document text
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/lipizusudaretoje.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/zogin-darotu-nesanuwubizotep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/487284b3-6444-49d6-878b-01f0271b7a4b/wokipazijuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e75bb9-eb0f-49f4-9e62-34a9e2fb54eb/can_a_18_year_old_date_a_16_year_old_in_maryland.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/tujosuvuxawobosumurexub.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/86107164213.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/kimudapafuwilewo.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/plague_inc_full_version_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/capsa_susun_mod_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/bissell_proheat_2x_9200_repair_manual.pdfIn PDF document text
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 5896 bytes
SHA-256: 4e9f7eb75c73977b012dfc947f7a9e0d1829b6f7b0be579dab8e6efa68586389
font_01_sfnt_off00010ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA0 12332 bytes
SHA-256: 5947527b10c2125f87413978fb05ba7e0a06e023e64f2cb9f4da7c607fd9a1e7

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