Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce227a456f2fd680…

MALICIOUS

PDF

68.4 KB Created: 2021-06-13 08:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d94952c6cc755065762bf7bcb7121b69 SHA-1: cbc2a3d584da2552f35b9d0dc33166a864a0c4bd SHA-256: ce227a456f2fd6805cfbfa0bb91730e29d7a29e96c678e9314bbd876318bc874
186 Risk Score

Malware Insights

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

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 0.9993

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
  • 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
  • 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://garglob.ru/pbw?utm_term=the+beach+house+beth+reekles+pdf+download PDF link annotation
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/426830.pdfIn PDF document text
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/buxufitesulugud.pdfIn PDF document text
    • https://kibalenujodoziz.weebly.com/uploads/1/3/0/7/130776895/c6b9eb303a1e.pdfIn PDF document text
    • https://neriguzoxivefu.weebly.com/uploads/1/3/5/3/135319498/44d57794f.pdfIn PDF document text
    • https://lerofazoneku.weebly.com/uploads/1/3/5/3/135314691/zesapelizemedu.pdfIn PDF document text
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/2066636.pdfIn PDF document text
    • https://revanesowokaw.weebly.com/uploads/1/3/4/6/134652238/wudakewikej.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/a5269fdf-c633-4a1a-b15d-7d3026e54016/loruziji.pdfIn PDF document text
    • http://kesowununak.pbworks.com/w/file/fetch/145201221/skoog_analytical_chemistry.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/w/file/fetch/144729279/xowusuneviruwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551c60aa-ad4e-49b8-8056-b8588d85a538/mujupukabasop.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144978912/henry_stickmin_collection_play_store.pdfIn PDF document text
    • http://buluwogot.pbworks.com/w/file/fetch/145179546/spider_man_far_from_home_stream_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b44ce9-b448-4eae-8cb6-5202f707f620/43440981545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb028f56-c0d4-46a6-8936-cd0fa427763c/zakalaxasafovexuwenek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09e55f8-2c13-4487-9d3f-930c6a463ab2/pimenedibovivapepesoloruz.pdfIn PDF document text
    • http://zanopadik.pbworks.com/f/tom_sweterlitsch_tomorrow_and_tomorrow.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/vineland_3_adaptive_behaviour_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b346ec-4b60-4a22-93f8-8a9c3ef0ff13/7119995304.pdfIn PDF document text
    • http://pafesudive.pbworks.com/f/51018542158.pdfIn PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/145206885/woxuwupoligij.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/la_barbuda_codigo_de_descuento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71289bd4-555a-4695-969e-7b7f7d2668e7/75632267680.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_off0000cbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD9 5488 bytes
SHA-256: c60d2815568421d51b2916454a5d3ec0eb58ee07374f8701d9913a63e78c78f2
font_01_sfnt_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 10556 bytes
SHA-256: 85d188aa33682684696effbf87525ad54652524a75bb074fc1b019684cf1ece1