Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeec3ad2e96c995…

MALICIOUS

PDF

74.7 KB Created: 2021-03-17 23:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70373e60566458db278b5606ae97df3e SHA-1: 6f956fe4d4456dd35a98f91c291295a7215ad1cd SHA-256: bdeec3ad2e96c9950fc120d16d9076069f2262aaa410d27303da8515a8ff65c7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'shortcuts app twitter video' and is associated with a URL that appears to be a lure. The presence of numerous external URIs, many hosted on disposable domains, suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fokemale.ru/123?utm_term=shortcuts+app++twitter+video PDF link annotation
    • http://lifegirls.site/suzavukapasajubenuw8kbt.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/dowuzozixajibam.pdfIn PDF document text
    • http://genusttwsr.fun/ziroradiweworekbw4in.pdfIn PDF document text
    • http://keepqifi.space/caracteristicas_de_un_algoritmo_definidojilsi.pdfIn PDF document text
    • http://reduslim-shopofficial.site/toefl_book_freet1vfb.pdfIn PDF document text
    • http://servempieza.site/what_is_a_strong_organizational_culturenf8dl.pdfIn PDF document text
    • http://alex-travel.moscow/562825109492ou1g.pdfIn PDF document text
    • http://brumbum3.xyz/cyclops_spotlight_replacement_batterytr1ng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/531fa4c2-dcab-4902-9488-e90aee6d7ce1/11029557487.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/sowozirenuxomoxaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5950f005-98a4-4fcf-b80a-33f87150ba6a/lepuwotofaruseruravake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868ef4e5-8ce3-4842-9467-8e1510a33b4a/foloxerepisebekewev.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wunefenabudav.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/14685169436.pdfIn PDF document text
    • http://disobaratid.rf.gd/mes_130p_bluetooth_digital_electric_smoker_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5beb21-d498-447f-9c08-d394a542accb/mame_0.220_full_romset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34c66f8-044b-41c2-9f47-b1a40cbf82a0/binomial_theorem_examples.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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 5384 bytes
SHA-256: 490295317292e9162cb3b2e82e26d5b6e03f0aa6bbc11e18493b08af4bdc2014
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 10672 bytes
SHA-256: 4b54325f780c3818874cb6218adbbac56f6eb38103921fc5624989ce24fe061b

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