Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e44e3739a2155d…

MALICIOUS

PDF

78.0 KB Created: 2020-11-22 13:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c311399a50f4e3ab930d974a3462e049 SHA-1: ba6c62bec3a60cd719fb42471ecc2236808a1634 SHA-256: 98e44e3739a2155df8623cd980eef28d24d59849a7ca4a4876613a76c4ac3919
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO farms or to direct users to malicious sites. ClamAV detected this as Pdf.Phishing.Trojan, and a ML classifier also flagged it as malicious. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=graphic+novel+terminology PDF link annotation
    • https://jorogusanige.weebly.com/uploads/1/3/4/7/134715450/6215027.pdfIn PDF document text
    • https://sajesugepila.weebly.com/uploads/1/3/4/4/134467456/xomaza.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/6744010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f92f3d16d47f.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/1940979.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/1318021.pdfIn PDF document text
    • https://fakuduvedutew.weebly.com/uploads/1/3/4/8/134866980/dazelovum_lobixodonuvili_pufojejuru_xasekuluduxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/arkansas_state_police_fatal_crash.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/touch_bmx_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/tusobisagupudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12c6af9-ed6b-433f-b328-4c279686563c/ejercicios_adverbios_de_tiempo_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/poema_el_cuervo_edgar_allan_poe.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/globalism_vs_globalization.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73E 3436 bytes
SHA-256: 956e56fe38f8c038832e3dd0250e5702a4e8bbb23f6e41819fc1bf68275c7339
font_01_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 5364 bytes
SHA-256: 8ebe115550ef45d33f5f95513353d35c598be11bbea87907a988ade11158c03d
font_02_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 11264 bytes
SHA-256: 843c9255833dbc5514b957d3cb39a99807efcf51f3bdbe6061dde5bec53a3fc2

Open this report in the interactive analyzer, or submit your own file for analysis.