Malicious PDF — malware analysis report

Static analysis result for SHA-256 18747172c528ed77…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 15:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 01e71bd2b818eb91114cc03e1ff223e9 SHA-1: 97e37cfa1f4d37e3d3c7781c0b0c6d32773b1a44 SHA-256: 18747172c528ed77649608534c3baa4e326e917a0c3ebd2200659a7cc88ac260
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=sao+alicization+lycoris+how+long+is+chapter+1 PDF link annotation
    • https://cdn.sqhk.co/zotofoza/iXwgdhB/6289440055.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/gajajegimeworu-jijexomef-batofikefokinug.pdfIn PDF document text
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/fe906.pdfIn PDF document text
    • http://llloooodddd.space/100236294854sssn.pdfIn PDF document text
    • http://sigonalen.22web.org/felejezanopivoba.pdfIn PDF document text
    • http://allerlo.xyz/lanukevanidipi17o1i.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/hfgf6if/full_stack_payment_solutions.pdfIn PDF document text
    • http://xovuwut.iblogger.org/38499208188.pdfIn PDF document text
    • http://fefosawixamuwow.22web.org/21275173009.pdfIn PDF document text
    • http://jetulugu.iblogger.org/les_misrables_movie_soundtrack_-_one_day_more.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/iihzgj6/29631858579.pdfIn PDF document text
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/ketekobala.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/964372f854.pdfIn PDF document text
    • http://study-english-05.site/jemusewcb3q.pdfIn PDF document text
    • http://hushseo.online/wuxazigusurofijejvdz9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sedopati.epizy.com/fire_burn_the_haters_music.pdfIn PDF document text
    • http://gatituz.rf.gd/cheran_pandiyan_movie_comedy_videos.pdfIn PDF document text
    • http://ruxogofirovudux.epizy.com/derivatives_of_e_and_ln_worksheet.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_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 5596 bytes
SHA-256: d03fc310354e704e2cd9ba004abdf0beebb9c635016f934fe2d2e6bd24d88858
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 10188 bytes
SHA-256: fa0e2303e6ec26bd876d84bc4ba46839a24967fe19a237906b824925954beae0

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