Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cebe8026da91ee1…

MALICIOUS

PDF

101.5 KB Created: 2021-03-01 00:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bdc0d801a2b79a1c44cedeb07f437939 SHA-1: 7837f470381c8628c37e47c09b652d8c0f57c707 SHA-256: 1cebe8026da91ee1b6bd134fd1a174c0964c32d306b9996cd3c842fb562e5dc6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link disguised as a search result for a common query. This suggests a phishing or link-farming attack. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of many external links points towards an attempt to redirect users to malicious sites.

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://zajinet.ru/strik?utm_term=how+to+sync+anker+keyboard+to+ipad PDF link annotation
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/monawusenepuni.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/kikivibubin-dofaka-lonobivuje-wijan.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/vidizesumazazad.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/5203373.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/gupojakami/crafting_dead_map.pdfIn PDF document text
    • http://fapujeg.epizy.com/60291432728.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/dewusojevubu.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/50307112197.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/mere_bhole_bhandari_ringtone_pagalworld.pdfIn PDF document text
    • http://zilapiwet.epizy.com/video_alfy_saga_penghianatan_cinta_darimu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/ammi_ammi_mithithu_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/ganupizakud.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/6657913870.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/159933407.pdfIn PDF document text
    • http://vikogen.epizy.com/vscode_format_code_css.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/java_7_update_80_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/40324288611.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_off00015027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15027 5396 bytes
SHA-256: a2acf120a33bbee21e0dbfab47aff7d88c6c66ba5ac7d7f2129466ad858719d0
font_01_sfnt_off000162a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162A4 11216 bytes
SHA-256: cce10b8e449b57374e4b0952a7b03fdbe206f456f9ca6a903173d291da2fd6ab

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