Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9297d4a458158a…

MALICIOUS

PDF

81.4 KB Created: 2021-02-23 16:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 49315c498293eb6a563f37b67c72b729 SHA-1: e1e96e891db72561549e643a282cc7d250f3e4e6 SHA-256: 5f9297d4a458158a03f67d2b61275a314c3224ef9c447942acff05eb301c5b70
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely using JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jacksth.ru/wb?keyword=wordpress%20theme%20development%20guidelines PDF link annotation
    • http://volamejabevakik.22web.org/marketing_communications_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/VjcNehg/escape_alcatraz_escape_room.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Thhiage/68067703045.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/hhvfifH/lamemazotirapiwagitede.pdfIn PDF document text
    • http://fineagencyy.com/aadhar_card_mobile_number_registration_offline_formix71n.pdfIn PDF document text
    • http://mibamixuxonewu.22web.org/pazos.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/jewCIic/mad_dragon_defense_mod_apk_download.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/carrie_bradshaw_style_guide.pdfIn PDF document text
    • http://boviriso.22web.org/vomapopa.pdfIn PDF document text
    • http://linogozajasupe.22web.org/amma_songs_ringtone_masstamilan.pdfIn PDF document text
    • http://demejizato.22web.org/84137529551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajojamoxarug.epizy.com/wufudumusixizesugib.pdfIn PDF document text
    • http://fopekexu.epizy.com/mail_alice_su_android_problemi.pdfIn PDF document text
    • http://bofogaf.rf.gd/35258509453.pdfIn PDF document text
    • http://gimezevu.epizy.com/52295597428.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/23918989426.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/minecraft_sphere_template.pdfIn PDF document text
    • http://pobipegosaba.epizy.com/antonius_cleveland_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/mindfulness_guided_meditation_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/catia_v5_learning.pdfIn PDF document text
    • http://dopuviboxew.rf.gd/19459278302.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_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 5236 bytes
SHA-256: 6ad66f50731e61d0cdb2095c17af2b69dbd0fbb824e54d05544d1410887a0a1d
font_01_sfnt_off00011216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 11148 bytes
SHA-256: d4542e18b0e82b598ba658763403a2a10645505fe7855bddb59c3fbc50ee06bc

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