Malicious PDF — malware analysis report

Static analysis result for SHA-256 55efb520262e754e…

MALICIOUS

PDF

74.2 KB Created: 2021-02-28 15:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7aef6a56f81286b4deca2946a66bc5ac SHA-1: dc82c96f208afe23112d21be9f18450f28fca183 SHA-256: 55efb520262e754e9a297304b7bcb08b4025a37de53b033f6a45221aa6e137ec
196 Risk Score

Malware Insights

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

The PDF document contains multiple suspicious links, including one disguised as 'fantasy_premier_league_rules' hosted on 'lnstagram-support.live', and another related to 'percy jackson book 6 and 7' on 'dugedepap.ru'. The presence of a large number of external links and a high ML classifier score indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dugedepap.ru/strik?utm_term=percy+jackson+book+6+and+7 PDF link annotation
    • https://mepaxojapukofu.weebly.com/uploads/1/3/4/6/134609152/fudiniwofokerapuzo.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/karajusuxum.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/wd_my_cloud_home_duo_noise.pdfIn PDF document text
    • http://uuuuull.space/sebarasovifarez3r7ss.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/8761258.pdfIn PDF document text
    • http://lnstagram-support.live/fantasy_premier_league_rules79o9a.pdfIn PDF document text
    • https://tenemetit.weebly.com/uploads/1/3/2/6/132696414/monumixeba.pdfIn PDF document text
    • https://vedasozeseso.weebly.com/uploads/1/3/4/3/134388395/xawogofisiw-kuzidovebur.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/b0434254cc4.pdfIn PDF document text
    • https://ponukikoruxa.weebly.com/uploads/1/3/4/3/134343798/zefadeja-pafagi.pdfIn PDF document text
    • http://trixy-matrix.space/twisted_treeline_guide_s8ix21x.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/bubeto/59750788908.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/como_tomar_una_foto_profesional_con_camara_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/harvard_referencing_guide_adelaide_university.pdfIn PDF document text
    • http://rijujala.epizy.com/raksha_bandhan_song_pagalworld.pdfIn PDF document text
    • http://levemenadipiwo.epizy.com/dutisop.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/what_skills_are_needed_to_be_a_network_engineer.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/xojowomunulol.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/28970953026.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_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 5516 bytes
SHA-256: 15775f7e4d9daa0142df536c30613ed22622d4c45d69c943c36421957d34aa76
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 11280 bytes
SHA-256: d991b50923317373a1cacbbed6e56912fd43038856a3c539e8edaaffa622a62c

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