Malicious PDF — malware analysis report

Static analysis result for SHA-256 5190ac5890ff7565…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 07:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e2bcb508c2778dccb014d8b8f6397c SHA-1: 20d3bffe15fcb7dd1653a55d653179ecc0224d9b SHA-256: 5190ac5890ff7565d27e51c3fc4a2c9696aed5a8ff3e49690ce61db4bf26b0fb
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external links indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=pdf+akuntansi+manajemen
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/wikar.pdf
    • https://cdn-cms.f-static.net/uploads/4481161/normal_601c630e3ee88.pdf
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/334c6f903.pdf
    • https://cdn-cms.f-static.net/uploads/4481834/normal_60384a77a0336.pdf
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/6608984619.pdf
    • https://cdn-cms.f-static.net/uploads/4464707/normal_604b952be882b.pdf
    • https://bawoxuvebi.weebly.com/uploads/1/3/4/8/134886771/bekipiku-lozalovubuzukiz.pdf
    • http://rurotal.22web.org/86580106101.pdf
    • http://pelobana.66ghz.com/hindustan_times_epaper.pdf
    • http://xojuxegalixiluj.66ghz.com/hold_on_chord_overstreet_musicpleer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/povodijirig/video_er_chrome_professional.pdf
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_e41c4e8c33094744998dda64a4dee11f.pdf?index=true
    • http://binaraw.epizy.com/77464419540.pdf
    • https://s3.amazonaws.com/dupula/can_you_make_an_appointment_to_renew_your_drivers_license_in_texas.pdf
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_b344abc89b9d461ea598e8da1f11141e.pdf?index=true
    • http://varebifadilo.epizy.com/80234836611.pdf
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_9b11174b31eb4ae6be73b8b061aec77e.pdf?index=true
    • https://s3.amazonaws.com/tokatefozude/71190953582.pdf
    • https://s3.amazonaws.com/divelatoxa/lomivililuw.pdf
    • https://s3.amazonaws.com/pirosisob/rupibaripizamebu.pdf
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_0305e0b10cc2448b93f4e313d55e1388.pdf?index=true
    • https://s3.amazonaws.com/satuja/xuxujusasora.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4c.bin
eae9b9e0e69a4b6bc0d774d7aa011b1d936d8ffc2a3d2056f74c832d13ff8b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 4836 bytes
font_01_sfnt_off0000eca5.bin
07c9fee25006888d74609a3f3112d26ed92bb523fd9a8ad6a6efc8726d88aa6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 10912 bytes
font_02_sfnt_off000111de.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DE 4324 bytes

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