Malicious PDF — malware analysis report

Static analysis result for SHA-256 e152aa52d1fc2b9a…

MALICIOUS

PDF

79.4 KB Created: 2021-03-22 10:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aa5987df0d7ffc968156abaab25c4238 SHA-1: b5b06008203d365baffe7a2022e7ac5c37be4d3b SHA-256: e152aa52d1fc2b9a9564090da0e3c5fcd58c8610301d2c63a2e7de358e872a51
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though obfuscated, appears to be related to search terms like 'late night restaurants atlanta georgia', likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://gimoguvi.ru/aws?utm_term=late+night+restaurants+atlanta+georgia PDF link annotation
    • https://tavulejitozusol.weebly.com/uploads/1/3/0/8/130873759/nobenivisipoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_603c651af0d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_603e81442a5a1.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/duwezulisi-butugusineduk-gevujora-luwut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_602d6e59b87fc.pdfIn PDF document text
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/gibelugedegud_xorumam.pdfIn PDF document text
    • http://cabinetsly.xyz/cursos_de_guitarra_electrica_gratis_para_descargarz18am.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fd795a8258c0.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/komunomakimufazek.pdfIn PDF document text
    • http://ayazshabutdinov.club/99832189268tnm15.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/aa595463-12f5-4bb4-8f58-6e9b4d5845b6/tisumenudiduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff70519-1021-463f-97c9-65b4210e41b1/28710127924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed5d67b-5c2f-4b10-a685-a1f92ee1b08e/79896581291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66461c8a-959e-471e-81e9-d1a3355d64bf/20831770590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465cfc78-e64e-422d-a667-587605df67d6/15537161973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548e8aa9-1eeb-41ec-9923-22447db9381c/23115430771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8ecdb3-c540-4eee-b2ec-e52cbf490141/panasonic_cordless_phone_manual_kx-tga470c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b987310-68e8-4bb5-9063-573dee45ea11/57935239675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72406324-988e-4670-a37e-b2f7e7856965/duripebananagugiboji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8992e3b4-4e9b-497c-9e1a-f79ce4036364/salary_for_mba_in_operations_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d71fca-d88f-46ec-8e22-fd9d94981440/8458816428.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_off0000f720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 4888 bytes
SHA-256: a827e264ddfaf7273e242aa259e510bbb9792755f48038e5df6586b34dea0ea5
font_01_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 11532 bytes
SHA-256: dedad648468bd22c6a1b0007a176ba5ff3cc1d2de1f7c8d8d934b515c38b0a14